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Патент USA US3095088

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Juhe 25, 1963
J. L. MORELLI ETAL
3,095,079
TYPEWRITER PRINT CONTROL
Filed Aug. 4, 1961
INVENTORS
JOSEPH L. MORELLI
FREDERICK A. BRIGNOLE JR.
LLOYD E. i-SIRE
MM
'
.
M)
ATTORNEYS
June 25, 1963
3,095,079
J. L. MORELLI ETAL
TYPEWRITER PRINT CONTROL
Filed Aug. 4, 1961
33 35
2 Sheets-Sheet g
50
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Vin IIIIIIIII-IIIIII'
4
INVENTORS
JOSEPH L.‘v MORELLI
'
v
FREDERICK A. BRIGNOLE JR.
LLOYD E. HA
BY
44.
'
.
M.
waé’ggam
RNEYS
3,095,079
o.
cm
Patented June 25, 1963
1
3,095,079
Joseph L. Morelli, Hartford, Frederick A. Briguole, .lrx,
Granhy, and Lloyd E. Hare, Hartford, Conn, assignors
TYPEWRITER PRINT CONTRGL
to Royal McBee Corporation, Port Chester, N.Y., a
corporation of New York
Filed Aug. 4, 1961, Ser. N . 129,327
15 Claims. (ill. 197—-1S3)
This invention relates to a novel means for automatical
ly varying the ring»cylinder clearance or" a typewriter in
accordance with the variations in thickness of the record
2
becomes better understood by reference to the following
detailed description when considered in connection with
the accompanying drawings in which like reference nu
merals designate like parts throughout the ?gures thereof
and wherein:
FIGURE 1 is a front elevational view of the instant ad
j usta-b-le banking ring and related parts.
FIGURES 2 and 3 are side elevational views of the
apparatus of FIGURE 1.
10
FIGURE 4 is an exploded perspective view of a por
tion of the banking ring and control linkage.
FIGURES 5 and 6 are enlarged fragmentary sectional
sheets operatively positioned in the carriage, and more
side elevational views showing the conditions of several
particularly relates to a novel banking ring arrangement
of the instant parts when the typewriter is conditioned
which is automatically shifted to different operative po 15 for lower and upper case typing respectively.
sitions in response to different thicknesses of the paper
Unless otherwise indicated it will be assumed that the
inserted in the typewriter carriage.
various conventional type parts shown in the instant
Most conventional typewriters are provided with what
drawings are constructed, supported and operated in a
is commonly referred to as an operational ring-cylinder
clearance, i.e. the type face of any of the type bars is
located a predetermined distance from the printing plane
of the cylinder or platen when the forward edge of the
manner similar to that for the corresponding parts of
the electric typewriter currently being produced and
marketed by the Royal McBee Corporation.
Referring to FIGURES 1 and 2 there is shown a cy
lindrical platen 10 which is rotatably mounted in a car
commonly encountered in this type of arrangement is
riage 11 that is mounted on the machine frame 12 for the
that as the number of record sheets inserted in machine 25 usual transverse letter feeding movement. The carriage
increases the effective ring-cylinder clearance decreases
11 is provided with a conventional type paper pan 13,
which in turn reduces the quality ‘of print work obtained.
paper feed rolls 14 and feed roll supporting and actuating
Where an attempted correction is made in the nominal
means 15 and 16. immediately below and generally in
ring~cylinder clearance to accommodate varying num
front of the platen N is a slotted segment 17 which is
bers of record sheets it is found that the center bars of 30 adapted to pivotally support a normal complement of
the machine require a different amount of positional cor
type bars, only one of these type bars being shown in
rection than do the end bars. A further di?iculty here is
section in FIGURE 1. A type guide 18 is operatively se
that the ring-cylinder requirements for the machine
cured to segment 17.
change when a case shift operation occurs. The prior
In conventional typewriters the slotted segment, such
attempts to overcome these di?iculties have not always 35 as 17, is provided with an arcuately extending banking
bar engages the banking ring. The dimculty which is
been entirely satisfactory in that these devices were either
too expensive to be practical, were not reliable and edi
cient in operation, and/ or required frequent manual ad
justments.
One object of the instant invention is to provide novel
means tor automatically adjusting the operative position
of a typewriter banking ring in accordance with the num
ber of record sheets operatively supported by the platen
ring which the type bars are adapted to ‘strike during their
respective printing strokes. The position of this banking
ring relative to the position of the platen (other factors
being ?xed) determines the ling-cylinder clearance ‘of
the machine as is well understood in the art and in that
this banking ring is usually ?xed relative to the seg
ment no adjustment can be made in this part of the ma
chine to accommodate varying numbers of superimposed
of the machine.
record sheets that are operatively placed in the carriage.
Another object of the invention is to provide a means
The instant apparatus is provided with a banking ring 20
for sensing the total thickness of the record sheets opera 45 that is mounted for movement relative to the segment 17
tively disposed in a typewriter and for correspondingly
as will now be described. The lower rearward portion
changing the limits of the type bar motion in accordance
of the segment 17 has a pair of shoulders 21, 22 in which
with the sensed thickness of the record sheets.
are respectively operatively ‘mounted pins 23- and 24
Still another object of the invention is to provide a
that are disposed along a common axis that is substan
novel ring-cylinder clearance adjusting means by pro
tially parallel to the axis of the cylinder or platen It}.
viding a banking ring which is movable relative to the
A banking ring supporting bail 25, FIGURES 1, 2 and 4,
type bars and/or platen and ‘whose operative position rel
is pivotally mounted on said pins 23 and 24 and is pro
ative to the type bars and/or platen is automatically
vided with two studs 26 and 27 which respectively extend
changed in accordance with the case shift condition of
forwardly through suitable apertures formed in the said
the typewriter.
‘
‘
‘
'
segment 17; the aperture 39 for stud 27 being best illus
A further object of the invention is to provide a bank
trated in FIGURE 4. The banking ring 20 is secured to
ing ring which is movable relative to the typewriter seg
the stud end portions which protrude ‘beyond the forward
ment, and also a means for sensing the thickness of a pack
face of segment 17 and is thus capable of partaking of a
of record sheets that is operatively supported by the ma
swinging movement about the axis of said bail supporting
chine platen, the sensing means being operatively ar
ranged to automatically control the e?fective position for
pins 23 and 24. The ‘upper end of banking ring 20 is
operative effect on the end ‘bars of the machine as com
mounted on the upper end of a cantilevered bridge or
formed with two ?ngers 31 and 32 in which are mounted
adjustable set screws 33 and 34 having abutment heads 35
Another object of the invention is to provide a novel
and 36 respectively. Said screw heads are respectively
mounting means for permitting shifting of the operative
adapted to engage the forward faces of a pair of similar
position of a typewriter banking ring relative to the ma 65 transparent members 49 and 41 which have concave rear
chine type bars and/ or platen whereby any given shift in
ward surfaces adapted to engage the record sheets sup
said operative position of said banking ring has a greater
ported by said platen 10. The members 40 and 41 are
the banking ring.
pared to the operative effect produced on the center bars.
hearing plate 42, the lower end of which is ?xed se
Other objects and many of the attendant advantages 70 cured to the machine frame by means of screws 43. The
of this invention will be readily appreciated as the same
plate 42 is made su?iciently resilient to permit a slight
3,095,079
.
V
3
-
amount of ‘?exures near the lower portion 44 thereof, this
?exing action here serving to normally lightly bias the rec
ord sheet engaging members 140 and 4-1 towards the ‘front
face of the platen 10 as illustrated in- FIGURE 2. A
pair of symmetrically disposed coil springs 45 and 46 are
operatively disposed between the ‘segment 17 vand the
forward face of the banking ring bail 25 so as to lig‘htly
bias said screw heads 35, 36 into engagement with said
members 40, 41 which in turn lightly bear against the
record sheets ‘and/or the platen 10. When the instant
typewriter is conditioned for typing lower case characters
the screw heads 35 and 36 will respectively engage said
4
members 4% ‘and 41 permit the unobstructed viewing of
the typed material.
When the typewriter is ‘shifted to an upper case condi
tion the segment '17 in being lowered as above described
will through the projections. 52, 53 cammingly cooperat
ing with said screw heads 35 and 36 and will shift the op
erative position of the banking ring as illustrated in
FIGURE 6 thereby altering the ring-cylinder clearance so
as to more efficiently accommodate the typing of upper
case characters which are usually larger in e?ective
facial area than the corresponding lower case characters.
Prolonged tests indicate that the instant apparatus in
sures a very superior print work control and has a very
members 40, 41 at points Stl and '51, FIGURES 4 and 5,
long maintenance free life.
just above the slight projections 52 and 53 formed on said
While there is in this application speci?cally described
members, as illustrated best in FIGURE 5. When the 15 one form which the invention may assume in practice,
typewriter is conditioned to type upper case characters
it will be understood that this form of the same is shown
said screw heads 35 and 36 in being shifted downwardly
for purposes of illustration only and that the invention
with the segment 17 will now engage said projections 52
may be modi?ed and embodied in various other forms
and 53, as best illustrated in FIGURE 6, and together
without departing from its spirit or the scope of the ap
with the banking ring 20 will be thereby shifted forward
pended claims.
ly to a'slight extent.
The invention claimed is:
In the operation of the instant apparatus when several
1. In a typewriter having a movable cylinder for op
record sheets are rolled into operative position in the
eratively supporting variable numbers of superimposed
carriage'as illustrated in FIGURE 3 the record engaging
record sheets, a plurality of type bars pivotally mounted
and sensing members 46 and 41 will ‘be forwardly dis 25 for selective printing movement towards said cylinder
placed to an extent determined by the number of sheets
and record sheets, and a banking ring adapted to be
so inserted, this slight movement away from the front of
engaged by said type bars during their respective print
the platen 10 being permitted by the ?exure of said lower
ing strokes; the improvement comprising means mount
portion 44 of the plate 42. As the movement of mem
ing said banking ring for movement to different operative
bers 40 and 41 thus senses the number of record sheets‘
positions so as to vary the ring-cylinder clearance of the
present the banking ring 20 and its supporting bail 25,
machine, and resilient means adapted to engage the rec
through the screws 33, 34 will be swung forwardly a pre
ord sheets 'for shifting ‘the operative position of said bank
determined distance about .the aXis of the bail supporting
ing ring in accordance with the cumulative thickness of
pins 23 and 24. The parts are constructed and arranged
the record sheets supported by said cylinder.
so that the extent of this predetermined forward swing
2. In a typewriter having a movable cylinder for op
ing movement of the bankint7 ring 20 is just su?icient to
er-atively
supporting variable numbers of superimposed
properly adjust the ring-cylinder clearance to accommo
record sheets, a plurality of type bars pivotally mounted
date the particular number of record sheets present in the
for selective printing movement towards said cylinder
machine.
As will be apparent as the number of record
and record sheets, and a banking ring adapted to be en
sheets increases and decreases the ring-cylinder clearance
respectively increases and decreases accordingly so that
the amount of ?exure or “Whip” of the various type bars
during their typing actions is always that which will pro
duce a sharp printed character on the top sheet of the
record pack. It will be noted that for ‘a given angular
pivotal movement of the banking ring 29 and hail 25
different points on the arcuate banking ring will partake
of different linear displacements in that these points are
located at varying distances from the pivot axis of said
pins 23 and 24. Thus when a given number of record
gaged by said type bars during their respective printing
strokes; the improvement comprising means mounting
sheets are rolled into the ‘machine and sensed by the rec
banking ring in response to a case shift operation of the
ord sheet engaging members 40, 41, the resultant shifting
of the operative position of the banking ring 20 will pro
said banking ring’ for movement to different operative
positions so as to vary the ring-cylinder clearance of
the machine, sensing means vfor sensing the cumulative
thickness of the record sheets supported by said cylin
der, and means conditioned by the operation of said
sensing means for determining the operative position of
said banking ring.
3. Apparatus as de?ned by claim 2; additionally com
prising means for shifting the operative position of said
typewriter.
4. Apparatus as de?ned by claim 2 wherein said bank
duce a greater ring-cylinder correction for the end bars 55 ing ring is mounted for pivotal movement about an axis
than for the center bars of the typewriter. This action
which is disposed substantially parallel to the axis of
corresponds to the inherent ting-cylinder needs and 10p
said cylinder whereby for a given pivotal shift movement
erational characteristics of the ‘bars of basket type ma
of said banking ring 1a greater change in the ring-cylinder
chines. By means of the above described apparatus and
clearance is created for the end bars of the machine than
the operational ieatures thereof a typist may insert ‘a 60
is created for the center bars.
single record sheet or a varying number of record sheets
5. In a typewriter having a movable cylinder for opera
into the machine and the proper ring-cylinder clearance
tively supporting variable numbers of superimposed rec
is automatically set so that a substantially uniform in
ord sheets, a plurality of type bars pivotally mounted for
tensity ‘and clarity of typed characters will result on the
selective printing movement towards said cylinder and
original and carbon copy record sheets. During normal 65 record sheets, and :a banking ring adapted to be engaged
typing operations the successive impact loads caused by
the various type bars striking the banking ring 20 are
transferred through the screw heads 35 and 36 ‘and the
record sheet engaging members 40 and 41 to the platen.
The relatively large members 40 and 41 will distribute
these impact loads over and through ‘a wide area of the
record sheets so that any resultant unit pressures against
the record sheets are far ‘below that required to produce
an ink transfer by any of the carbon paper present in
the pack of record sheets. Also the transparency of
by said type bars during their respective printing strokes;
the improvement comprising means for supporting said
banking ring for movement relative to said type bars,
and means adapted to bear against said record sheets
and cylinder for 1limiting the movement of said banking
ring in a direction toward said cylinder and for trans
ferring at least a portion of the impact loads of said type
bars against said banking ring to said cylinder.
6. Apparatus as de?ned by claim 5 wherein the last
mentioned means includes a plate means supported at
5
3,095,079
its lower end on the machine frame and at its upper end
by the said cylinder, and wherein the banking ring sup
porting means abuts against a portion of said last men
tioned means.
7. In a typewriter having a movable cylinder for opera
6
receiving positions, a plurality of type bars pivotally
mounted for selective printing movement towards said
platen and record sheets, and a banking ring adapted to
be engaged by said type bars ‘during their respective print
ing strokes; the improvement comprising a ?rst support
tively supporting variable numbers of superimposed rec
0rd sheets, a plurality of type bars pivotally mounted for
selective printing movement towards said cylinder and
record sheets, ‘and a banking ring adapted to be engaged
means having a lower end mounted on the machine frame
and a free movable upper end which is adapted to move
into engagement with the top one of said record sheets, a
by said type bars during their respective printing strokes;
movement relative to said type bars so as to vary the
the improvement comprising means mounting said bank
ing ring for movement to different operative positions
relative to said cylinder so as to thereby vary the ring
cylinder clearance of themachine, record sensing means
adapted to be engaged and displaced by the top one of
said record sheets, and means for shifting the operative
position of said banking ring in response to a displace
ment of said sensing means so as to ‘adjust the ring
cylinder clearance in accordance with the cumulative
thickness of the record sheets supported by said cylinder.
8. In a typewriter having a movable platen adapted to
operatively support a plurality of record sheets in print
second support means mounting said banking ring for
ring-platen clearance for different numbers of record
sheets operatively supported by said platen, abutment
means on said ?rst support means between said upper
and lower ends, and means for biasing said ?rst and sec
ond support means so as to move said blanking ring into
engagement with said abutment means and to move said
upper end of said ?rst support means into sensing engage
ment with the said top record sheet whereby said banking
ring is automatically operatively positioned relative to
said type bars and platen so as to thereby oreate the
proper ring-cylinder clearance for the particular number
of record ‘sheets supported by said platen.
receiving positions, a plurality of type bars pivotally
12. Apparatus as de?ned by claim 11 wherein said
mounted for selective printing movement towards said
second support means are mounted for pivotal movement
platen and record sheets, a segment .and a banking ring 25 about an axis which is substantially parallel to the axis
adapted to be engaged by said type bars during their
respective printing strokes; the improvement comprising
means mounting said banking ring for movement to dif
ferent operative positions relative to the typewriter seg
ment so as to vary the ring-cylinder clearance for various
numbers of said record sheets, means for sensing the
of said platen.
13. Apparatus as de?ned by claim 11; additionally
comprising a second abutment means on said ?rst sup
port means for ‘altering the ring-cylinder- clearance in re
sponse to a case shift operation of the typewriter.
14. In a typewriter, a frame, a movable platen adapted
number of record sheets operatively supported by said
to operatively support a plurality of superimposed record
platen, and means operated by the sensing means for
sheets in print receiving positions, a segment operatively
moving said banking ring to an operative position corre
supported in said frame, .a banking ring swingab-ly
sponding to the particular sensed number of said record 35 mounted on said segment, adjustable contact screws
sheets supported in print receiving positions on said
mounted on said banking ring, arm means having a lower
platen.
9. In a typewriter having a movable platen adapted to
end which is mounted on said frame and movable upper
ends which are adapted to be supported by said platen,
operatively support a plurality of superimposed record
the intermediate region of said ar-m means having a set
sheets in print receiving positions, a plurality of type bars 40 of abutment surfaces which are arranged to be engaged
pivotally mounted for selective printing movement to~
by the inner ends of said contact screws, and means ‘for
wards said platen and record sheets, and a banking ring
yieldably biasing said banking ring so that said contact
adapted to be engaged by said type bars during their re
screws engage said abutment surfaces and the upper end
spective printing strokes; the improvement comprising
means mounting said banking ring for movement to dif
=ferent operative positions relative to said platen, plate
means mounted on the machine frame and having a
portion which is adapted to engage the top one of said
record sheets, abutment means on said plate means, said
abutment means being constructed and arranged so as
to determine the operative position of said banking ring.
of said arm means are biased into engagement with the
top record sheet whereby the said banking ring is prop~
erly positioned and supported as determined by the num
ber of record sheets operatively supported by said platen.
15. Apparatus as de?ned by claim 14; additionally
comprising a second set of abutment surfaces on said
arm means which ‘are operative to alter the ring-cylinder
clearance of the machine in response to a case shift opera
10. Apparatus as de?ned by claim 9 wherein the lower
tion of the typewriter, said banking ring being mounted
portion of said plate means is connected to the machine
on said segment for pivotal movement about an axis that
?rame and the upper portion is adapted to be biased into
is substantially parallel to the axis of said platen where
engagement with said top record sheet, and means to 55 by a given shift in the operative position of said banking
bias said banking ring into engagement with said abut
ring has a greater effect on the ring-cylinder clearance
ment means, said abutment means being located on said
‘for the end bars than on the center bars.
plate means at a point intermediate the said upper and
lower plate means portions so as to maintain the upper
References Cited in the ?le of this patent
end of said plate means in sensing engagement with said
UNITED STATES PATENTS
top record sheet whereby said banking ring is main
tained in an operative position determined by the number
of record sheets supported by said platen.
11. In a typewriter having a movable platen adapted
to operatively support a plurality of record sheets in print 65
1,177,020
2,901,080
'Corcoran ___________ __ Mar. 28, 1916
Zeamer _____________ __ Aug. 25, 1959
251,661
Switzerland _________ __ Aug. 16, 1948
FOREIGN PATENTS
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