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Патент USA US2128867

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Aug. 30, 1938.
2,128,867
F. E. WELLER
WEB FEEDING MECHANISM
4 Sheets-Sheet l
Original Filed Oct. 6, 1952
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.INVENTOR '
BYFran/c E Weller
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ATTQRN Y-S
Aug. 30, 1938.
2,128,867
F. E. WELLER
WEB FEEDING MECHANISM
Original Filed Oct. 6, 1932
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INVENTOR
Fran/BE’ Weller
A IORNEVZ;
Aug. 30, 1938.
2,128,867
F. s. WELLER ‘
WEB FEEDING mncrmmsm
4 Sheets-Sheet 5
Original Filed Oct. 6, 1932
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ATTORNE
Aug. 30, 1938.
F. |-:. WELLER
WEB
FEEDING
2,128,367
MECHANISM
‘
Original Filed Oct. 6, 1932
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4 Sheets-Sheet ‘4
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2,128,867
Patented A... so, 1938 >
UNITED STATES PATENT OFFICE
2,128,867 '
WEB FEEDING MECHANISM
Frank E. Weller, Bloom?eld, N. 1., assignor'to
Trans-Luz corporation, a corporation of Dela
ware
-
>
Application October 6,1932, Serial No. 636,490
, Renewed December 29, 1937
'1 Claims. (01. ass-2s)
My invention relates to mechanism for feeding '
g?grawing' a printed web through a projection
In an important respect, my invention relates
5 to a combined web-feeding and tensioning ar
rangement for feeding the web through a projec
tion ?eld while maintaining the same taut and
. jtailane to insure highly satisfactory image projec
on.
Fig. 13 is a vertical sectional view; partly in
elevation, illustrating an arrangement for passing
convection heat currents into contact with a sec- 5
tion of the printed web.
.
In general, my- invention relates to a com
bined printing device and projector, said device
printing news items on a web which is moved
»
through the projector to project images of the 10
My invention has further reference to novel
features and characteristics of mechanism of the
character stated whereby said mechanism may be
e?iciently and satisfactorily operated by a person
printed characters on a display screen.‘ Although
combined devices of this general character are
well known in the art, my invention is important
of little skill.
because involving novel features contributing
-
Various other objects, advantages and charac
teristics of my invention will become apparent
from the following detailed description taken in
is
Fig. 12 is a plan view, partly in section, of a
part 'of the mechanism shown in Fig. 11; and
connection with the accompanying drawings.
, -
' My invention resides in the feeding mechanism,
20 arrangements and features of the character here
greatly to improved projection and simpli?cation 15
of operation.
_
,
,
For a detailed description of my invention,
reference is to be ?rst had to Figs. 1 and 2,
wherein C represents any suitable cabinet or
~ housing having, as herein shown, a detachable or 20
movable door (I. Disposed within the cabinet 0
is a projector P and a printing device D, the
an illustration of some of the forms thereof, ‘ latter being movable to the exterior of the cabinet
reference is to be had» to the accompanying C as hereinafter more particularly described.
As more fully described in the copendingUnkles 25
25 drawings, in which:
application Serial No. 325,551, ?led Deceniber 12,
Figure 1, is a side elevational_view of mecha
1928, and which has become U. S. Patent No.
nism as constructed in accordance with my in
2,018,691, dated Oct. 29, 1935, I represents a
vention;
_
Fig. 2 is a side elevational view oi.’ the mecha— base or support which may be suitably secured to
3o nism of Fig. 1 but with various parts in dif ~ the bottom wall of the ~cabinet C. , Rotatabl'y 30
ferent positions ;
mounted on the base I is a. turntable 2 which may Fig. 3 is an enlarged vertical sectional view. carry a. pivoted‘latch 3 coactable with a notch in
partly in elevation, of mechanism as constructed the base I for retaining the parts in the normal
position shown in Fig. 1, the latch 3 being re
in accordance with my invention; ,
,
'
, ina'fter described and claimed.
a
For an understanding of my invention and for
35 . Fig. 4_ is a perspective view of a part of the
mechanism shown in Fig. 3;
.
Fig. 5 is a plan view, with parts omitted, 01' a
part of the mechanism shown in Fig. 3;
Fig. 6 is an elevational view, partly in section,
40 and is taken approximately on the line 6-4 ofv
Fig. 3 looking in the direction 01.’ the arrows;
Fig. '7 is an elevational' view, partly in section,
and is taken approximately on the line ‘I-‘l of
leasable, however, so that the turntable 2 may be 35
rotated through an angle of 180 degrees into the
position shown in Fig. 2
Upstanding- from the turntable 2 is a standard
4 on which the aforesaid projector P is supported
in any suitable manner.
-
Pivoted to opposite sides of the turntable 2 are
the lower ends of two pairs of legs 5, 5 and 6, 6,
the upper ends of which are pivoted to a table ‘I.
The latter carries a pair of spring-controlled
‘ Fig.- 3 looking in the direction of the arrows;
Fig. 7a is a sectional view, partly in plan, of a ' latches 8, 8 which coact, respectively, with latch- 45
45
part of the web-tensioning mechanism;
,
,ing members 9, 9 carried by the standard 4. As
Fig. 8 is an elevatlonal view illustrating a modi
clearly appears, the latches 8, 8 serve to retain
?cation of the invention;
' '
'
Fig. 9 is a plan-view of a part of the mecha-_
5o nism shown in Fig. 8;
'
.~ Fig. 10 is an elevational ‘view, partly in section,
‘and is taken on the line' Ill-III of Fig. 9; '
11 isaivertlcal sectional view, partly in
elevation, illustrating a modiiéication oi’ the in
.' 55 vention;
the aforesaid pairs of legs ,in vertical podtion,
Fig. 1, and, when said latches are released, said
pairs of legs may be moved to inclined position as 50
shown in Fig. 2 to the extent permitted by one
or more chains III, or equivalent.
The printing device D, in the example herein
shown, is of the type known to the art as a.
Dow-Jones printer.
The printing m
55
2
2,128,887
thereof, these rows of corrugations being sepa
rated by a channel disposed centrally thereof.
Depending from the aforesaid bottom wall 23
housing l2 for the motor and other operating are a plurality of spaced ears which support a
transverse rod 33, Fig. 3. Mounted on the rod
parts of the printing mechanism.
As well understood in theart, the printing de v33 for free oscillatory movement are a plurality
vice D comprises spaced, upstanding plates in of spaced ?ngers 34 which extend in parallel re
which is journaled a horizontal shaft l3, Fig. 3, lation beneath the wall 23, Figs. 3- and ‘In, each
proper is detachably retained on the table ‘I by
a frame plate Ii secured in suitable manner to
said table 1. Depending from the table 1 is a
. carrying a type wheel l4 having characters dis
10 tributed around the periphery thereof. The
wheel I4 is freely slidable along the shaft l3 but
is keyed thereto for rotatable movement there
with. Coactable with the type wheel I4 is an
inking roller ii to which ink is fed by a roller 16,
15 ink being supplied to the roller ’ It in suitable
manner as well understood in the art. The rollers
l5. and ii are supported on a suitable frame l'l
slidable on a rod II and with which the type
wheel l4‘ together with said rollers l5 and I6 are
20 movable as a unit in either direction longitudinal
ly of the shaft l3. Coactable with the type wheel
I4 is a platen or presser bar I! which is nor
mally biased to the position shown in Fig. 3
and which is intermittently actuated, as herein
25 after described, for printing purposes.
As shown in Figs. 1 and 2, a pair of the legs
?nger 34 terminating in an inclined surface as
shown in Fig. 3. The ?ngers 34 are pomtively 10
biased for movement in a counter-clockwise di
rection. Fig. 3, and, to this end, it is desirable that
each ?nger be formed with an o?set mass of ma
terial 34a of su?icient weight to obtain the de
sired biasing effect. To prevent the operative ii
ends of the ?ngers 34 from dropping unduly, it is
desirable for each ?nger 34 to comprise a section
34b through which is threaded a screw 35 co
actable with the lower surface of the wall 23,
Fig. 3.
.
'
Referring particularly'to Figs. 3, 5 and 6, there
is shown a frame 33 which, along each side there
of, comprises a pair of spaced ears 31, 3141 so ar
ranged that one pair thereof ?ts snugly between
onepair of the ears‘ 3., 30a while the other pair’
thereof ?ts snugly between the other pair of the '
ears 30, 30a. As'shown on the drawings, a‘ screw
5, 6 support a suitable bracket on which is mount
ed a reel 20 having a web W wound thereon. This . 331s threaded through the pair of ears 30, 33a at
tends upwardly between the type wheel “ and
the left, Fig. ‘I, and the pair of ears 31, 314 which
are registered therewith. It results, therefore,
that the frame 35 may be swung ‘clockwise from
the full to the broken line position of Fig. 5
' platen l9, said web‘ W further extending through
about the screw 33 as an axis. The frame 33 may
web, in the example shown, is of suitable trans
30 parent or translucent material, such, for example,
as Cellophane. From the reel 20, the web W ex
the projector‘P as hereinafter to be described.
35 After the printing wheel l4 has been rotated to a
positively be retained in the full line position of
Fig. 5 by a screw 39 threaded in the ear 3. as
selected position, the platen‘ I9 is actuated to shown at the right of Fig. 7.
In accordance with my invention, the screws 33
thrust the web W into engagement with the
and 39 may be interchanged from the respective
selected character on said printing wheel.
The projector P comprises a housing 2| suitably positions shown in Fig. 5. ‘If this is done, the
40
40 supported on the standard 4, said housing having frame 36 may be swung from the full to dot-and
disposed therein a lamp bulb 22 or other suitable dash line position of Fig. 5 about the relocated
source of illumination. Light from the lamp 22
emerges as a light beam through a lateral open
screw 33 as an axis. The advantage of this fea
ture will be hereinafter pointed out.
Mounted in upstanding lugs 43, 43a of the
frame 36 is a rod 4| on which a plurality of rollers 45
42 are mounted.’ These rollers 42 comprise sec
tions 42a which coact, respectively, with the
aforesaid rollers 32 and each roller 42 also com
45
ing 2la in the housingi2l.
Arranged in horizontal alinement with the
.55
aforesaid opening 2ia is a light passage formed
by a bottom wall 23 and spaced side walls 24 and
24a, these walls forming a single casting which is‘
suitably secured to the lamp housing structure. prises sections 42b which gives weight thereto.
Disposed in the light passage thus formed are a I As clearly illustrated in Fig. 3, the rollers 42 are
loosely mounted on the rod 4| whereby they are
pair of condenser lenses 25, 2511 which are de
tachably retained in operative position in suitable biased in a downward direction for a reason here
manner, as by the transverse rod 25 and spring inafter to be stated.
The aforesaid frame 36 comprises sections 330,
members 21.
Transversely arranged with respect to the side 36a extending downwardly outside of the path of
walls 24, 24a is a’ front wall 23, Figs. 3 and 7,
the projecting light beam, said sections carrying
which forms a part of another casting suitably
secured to the casting which comprises the walls
wheels 44 mounted thereon for rotatable move
23, 24, 24a and which'is provided with an aper
ture 28a forming the projection ?eld of the herein
described projection mechanism, the condenser
lens 25 also abutting said wall 23 as clearly shown
in Fig. 3.
As illustrated particularly in Fig. 3, the afore
65 said front wali 23 comprises upper extensions ‘29
at the respective opposite sides thereof, each of
these extensions terminating in a pair of spaced
cars 30, 300, Fig. 'I.
60
The extensions 23 of the front wall 28 form
70 bearings for a transverse shaft 3| on which a
plurality of spaced rollers 32 are mounted for
rotatable movement therewith. As shown par
ticularly in Fig. 5, it is desirable that each of the
rollers 32 be provided with peripheral rows of
corrugations, along the respective opposite sides
a journaled‘ shaft 43 having a plurality of spaced
ment therewith.
Preferably, as illustrated, the
wheels 44 are edged and they are so spaced that
each wheel 44 coacts with one of the aforesaid
?ngers 34.
-
Secured to the frame 36 is a bracket 43 formed
in part as an annulus for the reception of the
casing 45 of an objective lens. The bracket 45
also comprises depending sections which carry a
plate 41 on which a mirror 43 is suitably secured,
as by the spring clips 49.
In order to place the herein described projector
mechanism in condition for operatiomthe frame 70
35 is swung on the pivot 33 until said frame to- ’
gether with the parts carried thereby are moved
into the position shown at'--the left of Fig. 5. A
length of the web W is then drawn through the
printing device D and laid against the plate 23, 75
3
2,133,807
' said web resting on the rollers 32 and projecting
' therebeyond. The frame 36 is then returned to
upwardly to thereby impart corresponding move- '
ment to the lines of images on the screen.
An important feature of my invention involves
the full line position illustrated in Fig. 5 and the
screw 39 placed in the position shown to positively the passage of the web W exteriorly of the casing
C and over‘ the grooves 50. ‘ 'Heated air from the 5
lock said frame in operative position. In so do
ing, the rollers 44 move against a transverse sec 'lamp 2! ascends through these grooves .and con
tion of the web W which is gripped between said tacts with the overlying web section to effect rapid
rollers and the ?ngers 34. At the same time, the drying of the ink thereon. This isadvantageous
roller vsections 42a come‘ into coacting relation because permitting the web section beyond the
10 with the respective rollers 32 whereby a second grooves 50 to be handled without smudging the 10
transverse section of said web is gripped.
inked characters thereon.
, - Preferably, as shown in Figs. 1, 2 and 13, an
‘
_
Another- important feature of my invention
area of the top wall. of the cabinet‘C, above the relates to the disclosed arrangement for trans
lamp housing 2|, is provided with the slots or versely gripping the web W at spaced points both
.15 passages 50. The web W is passed through this above and below the projection?eld. It is highly 15
top cabinet-wall C and arranged in overlying re - important for that web section ‘in the projection
lation with respect to this slotted area, said web ?eld at any given time to be substantially taut and
extending beyond the cabinet and hanging down plane in con?guration, i. e., unwrinkied and un
at one side thereof as clearly shown in Figs. 1 distorted. This, in accordance with the present
20
and 2.
a
'
The mechanism with the-web W properly posi
tioned therein for, the printing and projecting
operations is shown in Figs. 1 and 3. The print
ing mechanism D, as hereinbefore described, com
prises the printing wheel l4 which moves step
by-step along the shaft l3 transversely of the web
invention, is accomplished in a highly desirable 20
manner.
I
I
.
Immediately below the projection ?eld, the web
W is gripped at spaced points thereacross by the
rollers 44 ‘and the ?ngers 34 which coact, respecf
tively, therewith, the offset weights 34a on each 25
of the ?ngers 34 functioning to bias the latter
W, while‘ the latter is stationary,v to print a line 0 toward the rollers 44 with su?icient force to grip of inforniation thereon. .At the conclusion of the web W in the desired manner. ‘ Itfollows,
each line-printing operation, the printing wheel
30 I4 is automatically returned to its initial posi
tion' and, simultaneously,.a step of movement is
imparted to, a train of gear mechanism which in
cludes the gears 5| and 52, Fig. 3. The gear 52
is- carried by a stub shaft ilrotatabiy mounted
35 in a bracket 54 carried b'yarod 55 secured to
, the frame of the printing device D, the bracket
54 being maintained in the proper adjusted posi-‘
therefore, that equal restraining forces are ap
plied to the web W at spaced points thereacross’ 30
and it is’against these forces that the web is
pulled‘ upwardly by the rollers 32. The latter to—.
gether with the roller sections 42a also grip the
web at spaced points thereacross and, in an even
manner, move the web upwardly against the re- 35
straining force applied thereto by the ?ngers 34.
In practice, it has been demonstrated that a web
,tion on the rod 55 by a screw 56. The shaft 53 - restraining and -pulling arrangement of the char
is operatively connected to the shaft 3i and, pref-Q acter just described is highly advantageous and -,
efficient because maintaining the web section in 40
projection ?eld plane and even with resultant .
of the shaft 51 being connected to the shaft 53,‘ the
highly
satisfactory projection. The. provision of‘
Fig. 4, and the other end of said shaft 51 being
the
edged
rollers 44 is highly important because
connected to the shaft 3|, Fig. 7.
.
The rollers 32 are mounted on the shaft 3|, the these rollers coact with the freshly inked surface
web W being gripped between these rollers-and the - of the web W. However, since these rollers'are of 45
roller sections 42a. Accordingly, it results that knife-edge con?guration, little or no smudgi'ng of
40 erably, a ?exible shaft 51 is thus utilized, one end
each return of the printing wheel l4 to its initial‘
position effects actuation of the rollers 32 whereby
a'step of movement is imparted to the web’ W, the
50 gear ratio being so chosen as to obtain the desired
the ink occurs.
.
The use of weights; i. e., the ?nger sections 34a
and the ‘roller sections 42b, gives improved results
compared -.with the ‘spring arrangements which 50
heretofore have been generally utilized for biasing
purposes. The heat generated by the projection
lamp and other adverse factors cause the' force
spacing between the printed lines. As shown in
Figs. 1 and 2, the web W extends over the slotted
cabinet area 50 .and hangs down beside the front of a biasing spring to vary or change from time to‘
cabinet wall. The action of gravity on this hang- , time. The biasing effect of the above described 55
ing web section tends to keep the web relatively
taut back to" the [wheels 42.
’
‘ It follows, therefore, that the web W is moved
upwardly step by step to bring the successive lines
60
of printed matter into the projection ?eld, i. e.,
the ?eld de?ned by the aperture 28a. of plate 23.
. Light from the lamp 22 passes from right to left,
Fig. 3, through the condenser lenses :3, 33a,
through the aperture‘ 23a, and then through the
web section de?ned by said aperture, the light
65 i beam thereafter engaging the mirror 43 andbeing
_ de?ected vertically upward through the objective _
weights, however, is constant and invariable.
Another important advantage of the herein de
scribed invention relates to‘ the arrangement
whereby the frame 36 together with the parts car
ried thereby maybe swung to one side when it 00
becomes né’cessary to re-thread' the web through
the projector ?eld or otherwise service parts of .
the machine. By virtue of the disclosed arrange
ment, the web re-threading operation is extremely
simple‘ and readily performable even by an un- Q5
skilled worker.
A further feature of. importance relates to the I
lens 46, said light beam thereafter passing to any
interchangeability of the pivot pin-"for the frame ' '
suitable re?ecting system and screen, not shown,
36. Accordingly, it follows that ‘said frame may
70 where images appear of the tape characters then . be moved to either of the broken‘ ‘line’ positions 70'
‘on theiweb section in the projection ?eld‘lla, illustrated in Fig. 5, it beinghecessary simply to
These images remain stationary on the screen reverse the respective positions of the-screws '33
while the web remains stationary but, each time
that the printing wheel l4 returns to its initial po
sition,
the printed lines on the web are stepped
75
and 39 as desired. It may be desirable thus to
interchange these pvot screws due to‘ some local
condition arising connection with a particular .15
2, 128,867
84 to which is pivoted a pawl 85 coactable with a
ratchet wheel 88 rotatable with said shaft 3|.
As clearly appears in Fig. 8, the cam 12 is of
installation which might prevent pivotal move
ment of the frame 35 in one direction while per
miting free pivotal movement in the other direc
tion.
-
-
. the double-surface type and, as shown in this
_
In Fig. 2, I have illustrated the printing mech
anism D in the servicing position thereof. The
door d of the cabinet C has been removed and
the turntable 2 has been rotated through an an
gle of 180 degrees. ' Thereupon, after release of
10 the latches 8, the printing mechanism is swung
on the legs 5, 8 to the extent permitted by the
chains l8. It will be observed that the ?exible
shaft 51 is of such length that the described
movement of the printing device D to ‘servicing
15 position may be effected without interfering with
the driving connection between said printing de
vice and the web-pulling rollers 32. This ob
?gure, the cam is in one of its normal positions.
The gear ratio of the train of mechanism lead
ing up to the gears 5| and ‘I8 is such that each
actuation of said train of mechanism, as e?ected
by the return of the printing wheel H to its
initial position, causes the cam 12 to rotate 10
through an angle of 180 degrees.
It follows, therefore, that when said printing
wheel |4 returns to its normal position as stated,
the cam 12 is rotated counter-clockwise, Fig. 8,
through an angle of 180'degrees. As a result,
the switch 15 is tipped in a clockwise direction,
Fig. 8, and the circuit through the solenoid ‘I8 is
viously, is a distinct advantage. After the print- ‘ closed. Accordingly, the lever 8| is moved in a
ing device D has been returned to normal posi- ‘ counter-clockwise direction, Fig. 8, to thereby
tion, the web section‘ exteriorly of the cabinet
may be grasped to pull the web through the pro
jection ?eld until the slack has been taken up
and, thereafter, the normal printing and web
pulling action occurs.
'
Referring to Figs. 11 and 12, there is illus
trated a modi?ed arrangement for biasing the
web into engagement with the rollers 44. Thus,
in lieu of the fingers 84, there is utilized a bar
58, the length of which is about the same as the
width of the web W. The bar 88 is pivoted for
movement in a horizontal plane to a second bar
8| which at one end projects beyond the wall 24
and at its other and projects beyond the wall 24a.
Pivoted exteriorly on each of the walls 24 and
24a is a bell crank lever 52 which comprises an
offset weight section 52a, the levers 52 being
suitably connected to the respective opposite
ends of the bar 5|.
'
-
impart a rotatable step of movement to the shaft 20
3| while the web W is correspondingly moved
through the projection ?eld.
Movement of the cam 12‘ through the angle
of 180 degrees occurs almost instantaneously and, '
as will be obvious, the switch 15 is immediately 25
returned to the position shown in Fig. 8.
As a '
result, the circuit through the solenoid ‘I8 is re
opened and the lever 8| returns to the position
shown, the pawl 85 idling with respect to the
ratchet wheel 85. The mechanism is now in con; 30
dition to impart the next feeding impulse to the
web W which occurs, in the manner' described,
as soon as the ‘printing wheel l4 again returns
to its initial position.
When the application of energy to the shaft 8|
is discontinued 'in response to deenergization of
the solenoid 18, there occurs some reverse move
ment of the shaft 3| in a counter-clockwise direc
The levers 52 tend to move in a clockwise tion, Fig. 8, unless special mechanism is provided
direction, Fig. 12, whereby the bars 5| and 88 to prevent such reverse movement. Mechanism 40
are biased ina direction from right to left, Figs. ‘ for this purpose is illustrated in Figs. 9 and 10.
. 11 and 12. The bar 58 comprises a sloping sur
face and maintains the web W against the rollers
44 with the required degree of pressure, the piv
otal mounting for said bar 88 permitting the
same to assume the proper operative position
with respect to the rollers 44. The arrangement
of Figs. 11 and 12 as thus described gives satis
factory results although the arrangement in
volving the ?ngers 34, at present, ispreferred
thereover.‘
In Figs. 8 and 9, I have illustrated a modi?ca
tion of the invention as regards the driving con
nection between the printing device D and the
projector mechanism P. As shown, the member
55 supports a bracket 18 which carries a stub
shaft 1| having‘secured thereto a cam 12 to
gether with a gear 18 which meshes with the
aforesaid gear 5|.v Pivoted on the bracket 18 is
a frame 14 carrying a cam follower‘ ‘I5 and a
mercury switch 15, the frame 14 being biased
by a spring 11 in a clockwise direction, Fig. 8,
whereby the follower 15 is maintained in engage
ment-with the cam 12. Leading from the switch
‘15 is a cable comprising a pair of conductors
which lead to the respective terminals of a sole
noid ‘I8, said cable including the plug ‘I8 which
is readily detachable from the socket 80 for open
ing the circuit to the solenoid 18.' 'The solenoid
70 18 may be moimted on the exterior surface of
the wall 24 and is utilizable for actuating a lever
7 8| which terminates in a gear segment 82 dis
posed in meshing relation with respect to a gear
wheel 88 loosely mounted on the aforesaidv shaft
8|. Rotatable with the gear wheel 83 is a disk
As shown, a housing 85 is suitably secured to the
extension 28 of the wall 24 and this housing has a
disk 84 rotatable therein, the disk 84 being secured
to the shaft 3| for rotatable movement therewith. 45
The housing 85 comprises a passage having there
in a ball 83 biased by a spring 88 into engagement
with the edge of the disk 84. .
When the shaft 8| is moved in web-feeding
direction by the pawl 85, it moves in a clockwise 50
direction, Fig. 10. During such movement of the
shaft 3|, the disk 84 merely thrusts the ball 83
against the spring 88. However, as will be obvi
ous from Fig. 10, the ball 83 functions as a locking ‘
dog and positively prevents counter-clockwise
movement of the disk 84 and the shaft 8| which is
connected thereto.
Since the ball 88 and disk 84 function as just
stated, it results that the shaft 8| does not
recede, even slightly, from the position to which 60
advanced by the pawl 85. This is highly desir
able because preventing the occurrence of ‘sag of
the web section in the projection ?eld. Should
this web section sag, the resultant projection‘ is
more or less unsatisfactory due to pooiv‘image 65
focus.
'
-'
,
Use of the mechanism last described, namely,
the housing 85, disk 84, ball 83 and spring 88 is
highly desirable with all forms of my invention.
Hence, in Fig. 7, I have illustrated such mecha 70
nism as applied to the shaft 8| to prevent reced
ing movement thereof after the application of_
energy to-the shaft 51 has been discontinued.
with an arrangement of the character de
scribed in Figs. 8 and 9, it is necessary merely to 75'
2,128,867
detach the members ‘I! and 80 when the printing
device D is to be moved .to a position such as
shown in Fig. 2.
In the appended claims, it shall be understood
5 that the expressions “means for printing," “print
ing device,” or equivalent expressions generically
comprehend a Dow-Jones or other printer, or any
- equivalent arrangement such, for example, as a
typewriter utilizable for producing or forming
10 characters in'line form transversely of a traveling
web.
'
While the invention has been described with
respect to certain particular preferred examples
which give satisfactory results, it will be under
is stood by those skllled in the art after understand
ing the invention, that various changes and modi
?cations may be made without departing from the
spirit and scope of the invention and it is intended
therefore in the appended claims to cover all such
changes and modi?cations.
What is claimed as new and desired to be
secured by Letters Patent is:
,
1. Projection apparatus comprising a projec
tion ?eld with respect to which a character-bear
ing web is movable, a frame, optical structure car
ried by said frame, and means forming pivotal
5
therethrough, coacting sets of elements at the
other side of said projection ?eld for applying a
retarding force to said web, a frame carrying one _
set of said rollers and one set of said elements, and
means for movably mounting said frame whereby
the set of rollers and elements carried thereby
may be moved aside when it becomes necessary to
position the web in said projection ?eld.
5. Projection apparatus comprising a projec
tion ?eld with respect to which a character-bear 10
ing web is movable, means for drawing said web
through said projection ?eld, and means for
retarding the passage of said web through said ‘
projection ?eld, said last named means compris
ing a plurality of rollers engaging said web at 15
spaced points thereacross, said last named means
also comprising ?ngers coactable, respectively,
with said rollers for engaging the web therebe-_ .
tween.
.
6. Projection apparatus comprising a projec 20’
tion ?eld with respect to which a character-bear
ing web is movable, means for drawing said web
through said projection ?eld, and means for re
tarding the passage of said web through said pro
jection ?eld, said last named means comprising a 25
plurality of rollers engaging said web at spaced
axes for said frame at opposite sides, respectively, points thereacross, said last named means also
of said projection ?eld.
comprising gravity-biased ?ngers coactable, re
2. Projection apparatus comprising a projection J spectively,~with said rollers for engaging the web
?eld with respect to which a character-bearing therebetween.
30
web is movable, a frame, optical structure car
7. Projection apparatus comprising a projec
ried by said frame, and means forming vertical , tion ?eld with respect-to which a character-bear
pivotal axes for said frame at opposite vertical ing web is movable, sets of coacting rollers at one
sides, respectively, of said projection ?eld.
side of said projection '?eld for drawing said web
3. Projection apparatus comprising a projec
tion ?eld with respect to which a character-bear
ing web is movable, a frame, an objective lens and
therethrough, coacting sets of elements at the 35
other side of said projection field for applying a
retarding force to said‘web, a frame carrying one
set of said rollers and one set of said elements, a
mirror and an objective lens carried by said
a light-reflecting mirror carried by said frame,
and means forming vertical pivotal axes for said
40 frame at opposite. vertical‘ sides, respectively, of 9“ frame, and means for movably mounting said
40
said projection ?eld.
‘
whereby the set of rollers and elements
4. Projection apparatus comprising a projec ‘frame
1together with the mirror and lens carried thereby
tion ?eld with respect to which a character-bear“ may be moved aside when it becomes necessary to
, ing web is movable, sets of coacting rollers at one ' position the web in said projection ?eld.
45 side of said projection ?eld for drawing said web
FRANK E.WELLER, u
r
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