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Патент USA US2109293

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‘ Feb. 22, 1938.
Filed Oct. 14, 1937
2 Sheets-Sheet 1
,Zazzz's' Jensen.
Feb. 22, 1938'.
Filed Oct. 14, 1937
2 Sheets-Sheet 2
\lIL I
Patented Feb. 22, 1938 }
Louis Jensen, Chicago, Ill., assignor to United
Autographio Register 00., a corporation of
Application October 14, 1937, Serial No. $9,017
6 Claims. (Cl. 197-128)
This invention relates to adapters for type
of the platen carriage. Upwardly swinging latch ~
writers to facilitate the use of continuous-form
stationery, and more particularly to an improved
typewriter attachment having an extensible
frame upon which a carbon-holder may be ad- '
justably mounted.
The primary object of the invention is to pro
vide an inexpensive, light attachment which may
be attached to the platen carriage of a type
1 O writer so as to move therewith and support con
tinuous-form stationery led over the device to
writing position in the machine.
A further object of the invention is to adjust
ably. mount a carbon-holder _ on the extension
frame so that the position of carbon sheets an
chored to said holder may be changed as the
carbons become worn. That is, the holder may
be moved forward on the extension frame and
the worn front edge portions of the carbon may
be. severed and discarded.
The present invention is an improvement over
the device shown in my Patent No. 2,000,641, is
sued May 7, 1935.
The invention is illustrated in the preferred
5' embodiment in the accompanying drawings, in
Figure 1 is a side elevational view of the device
showing how it is mounted on the rear of a type
writer, the typewriter being shown brokenly; Fig.
2, a broken plan view of the device; and Fig. 3,
a longitudinal sectional view, taken as indicated
at line 3 of Fig. 2.
In the embodiment illustrated, A designates a
supporting frame; B, an extension frame slidably
mounted for forward and rearward movement on
the frame A; and C, the carbon-holder adjust
ably mounted on the frame B‘.
As shown in Fig. 1, a bracket 4 has its front
end ?xed to the main frame 5 of a typewriting
40 machine by- means of screws 6. A channel-like
track 1 is ?xed to the rear ends of the bracket
4 so as to provide a rigid support for the adapter.
The typewriting machine is shown with the usual
shiftable c rriage 8 in which is journaled a plat
' en roll 9. The rear of ‘the carriage is provided
with a cross rod l0 which serves as a support for
bars it are pivotally mounted on the brackets I3,
as indicated at H. The latches are urged up
wardly by tension springs l8 so as to ?rmly grip
rod l0. To the front end of the supporting plate 5
II is ?xed a transversely disposed guide bar H!
by means of screws 20. A pair of L-shaped up
wardly presented guide members 2| are adjust
ably secured to the cross bar by means‘of a pin
and-slot connection 22. The purpose of these 10
guide members is to direct the stationery to the
platen roll in proper transverse alignment.
A pair of longitudinally extending angle bars
23 are spot welded to the lower side of the sup
porting plate A to reinforce the plate and form 15
an open channel under the slot l2. A sheet met
al housing 24 encloses the rear end of the chan
nel thus formed and forms a closure for a grooved
pulley wheel 25 which is pivotally mounted there
in, as indicated at 26. The rear end of the frame
is provided with a downwardly extending brack
et 21 on which is anti-frictionally mounted a roll
er 28 adapted to travel in the channel-like track
‘I and support the attachment. A rearwardly ex
tending channel-like track 29 is ?xed to the lower
portion of the housing 24 and serves to support
the rear end portion of the extension carriage B.
As best shown in Fig. 3,,a latching bar 30 is piv
otally mounted, as indicated at 3|, in the channel
provided beneath the slot l2. The latching ,bar
comprises a pair of spaced longitudinally extend
ing strips which are connected at their rear end
by a cross bar 32 which is adapted to be engaged
by a hook provided on the extension carriage,
and their front ends extend forward slightly be- 35
yond the supporting frame I l and are secured to
a cross member 33 by means of screws 34. The
member 33 is adapted to extend slightly above
the upper face of the supporting plate ll so that
it may be depressed by stationery drawn around
the platen and thereby raise the cross bar 32 to
release the extension carriage for forward move- ,
As shown in Fig. 1, the housing 24 has a cut
away portion 35 and one of the angle bars 23 has
a cut-out 36 through which a pin 31 projects
the front end of the adapter, as will be explained
from the latching bar 30. A torsion spring 38
tudinally extending plate I I provided with a lon
gitudinal slot l2. A pair of forwardly and down
wardly extending brackets I3 are ?xed to the
plate II by means of rivets I4 and their lower
end portions are bifurcated, as indicated at ii,
thereby urges the member 33 upwardly into en
gagement with continuous-form stationery 39
which is led from a zigzag folded pack 40 over
the device to writing position in front of the
platen roll 9. A slight pressure on the member
33 is suf?cient to release the extension carriage B 55
The supporting frame A is shown with a longi- ‘ yieldingly urges the pin 31 downwardly and
m a to provide a socket to receive the cross rod l0
for ‘forward “movement, as will be readily under-_ is turned thereover.’ This process’is‘ repeated’
from side to side until carbon is interleaved be
The extension carriage B comprises a rectangu
lar frame formed by two longitudinal members
ll which are rigidly connected at their rear
ends by a transversely disposed guide member
42 and at their front ends by means of a trans
verse plate' It. The lower side of the plate 45 is
tween each of the strips. The ?rst set of forms
can then be inserted beneath the platen and
advanced to regular writing position.
After -a set of forms has been ?lled in, the
typewriter carriage is moved to the center of
the machine and the ends of the strips are backed
provided with two pairs of grooved wheels 45 out from under the platen roller. The extension
adapted to ‘engage-the edge portions of the sup
frame with the. carbon-holder will then move
porting plate and facilitate sliding ,movement" back to the original starting position and will
As shown in Fig. 1, a roller 45 is anti
.automatically become locked in its rearmost po
sition. The front set of forms may then be
frictionally Journaled between a‘ pair of down
wardly extending ?ngers 46 which are secured to grasped and drawn forward over the top of the
15 the guide member 42 and loosely embrace the . typewriter while the carbon head will hold vthe
side walls of the channel 29. Thus it will be
carbon slips and prevent them from being drawn
understood that the extension frame is mount
forward with the forms. Preferably, the suc
ceeding set of forms is advanced until its front
edge is one inch beyond the carbon paper and
then the completed set may be detached along 20
ed for forward and rearward movement with
respect to the supporting frame with very little
20 friction. As ‘shown best in Fig. 3, the plate 43
is prov'ded vwith a downwardly and rearwardly
exiending hook "which is notched for engage
ment 'with the latch bar 32. The hook is se
cured -in position by means of machine screws
25 48. A long coiled tension spring 49 is secured to
the front end of the: supporting frame by screw
the line of weakening provided between sets of ’
forms. When the next set of forms is advanced
into ‘writing position, the stationery will pull
down against the member 33 and release the
extension carriage so that the carbon-holder may 25
roll forwardly as the advanced set of forms ad
50 and is threaded rearwardly around the grooved . vances around the platen.
As the ends of the carbon sheets become worn
wheel 25 and secured to the hook member 41 by
they can be torn off a small portion .at a time,
means of a screw 5|. Thus it will be under
and ?nally, the last remaining unused portion 30
30 stood that the slight tension provided by the long
can be turned around and secured to the blade
spring 49 urges the extension frame B to its rear
56, thus using ‘the full sheet.
most position where it will be locked against for
If desired two or more carbon-holders can
ward movement by the latch 30 and hook ‘I.
The carbon-holder C comprises a transverse be supplied, for instance, where forms of differ
ent lengths are to be used in the same type
35 plate 52 having a pair of downwardly extending
studs 53 which are adapted to project through
any transverse pair of apertures 54 which are
arranged in a longitudinal series along the mem
bers ll of the extension frame. The weight of
the device is su?icient to hold the holder in its
adjustable position with respect to the extension
frame. The rear end of the plate 52 is bent
around, as indicated at 52'“, to provide a smooth
edge portion. The carbon-holder has upwardly
45 extending studs 55 for loosely impaling blades 56
to which are attached the rear edge portions of
the carbon slips as in my Patent No. 2,000,641.
Upward movement of the blades is limited by a
pivoted ball 51, in the well known manner. A
50 pair of guide ?ngers 58 are adiustably mounted
The foregoing detailed description has been
given for clearness of understanding only, and
no unnecessary limitations should be understood
therefrom, but the appended claims should be 40
construed as broadly as permissible, in view of
the prior art.
I claim:
1. A typewriter attachment comprising: a sup
porting frame adapted to be secured to the rear 45
of a platen carriage; an extension frame slidably
mounted for limited forward and rearward move
ment on said supporting frame; a releasable catch
for locking the extension frame in its rear
most position; and a carbon-holder adjustably
in slots 59 to keep the stationery in lateral
mounted on the extension frame so as to move
therewith, said holder having blades for secur
ing the rear ends of carbon slips in interleaved
relation with stationery led thereover.
2. A device as speci?ed in claim 1, in which 55
the supporting frame is provided with a rigid
The extreme rear end portion of the channel
'29 is provided with a bracket 60 which holds a
55 bar 6i provided with adjustable guide ?ngers 62
and a pair of guide rollers 63.
In using the device, the transverse channel ‘I
is normally left attached to the machine. To
remove the adapter, as may be done overnight or
60 when ordinary single sheets are being typed in
the typewriter, it is only necessary to pull the
latches I6 downwardly and the adapter can be
lifted off of the machine.
The device is adapted to use fanfold station
65 ery wherein the strips, in the pack 40, are con
nected to each other at one lateral edge. To load
the machine the pack of forms 40 should be
placed about a foot in rear of the adapter and
three or four lengths of forms unfolded and
70 laid over the top of the adapter and typewriter.
The carbon strips have their rear edge portion
folded over the blades 60 and may be attached
thereto by a small paper clip. The ?rst carbon
blade is then placed over the lowest strip with
75 the ?nger between the forms and the next strip
rearwardly extending channel-like track, and
the rear end of the extension frame has a roller
adapted to travel in said track and be supported
3. A device as speci?ed in claim 1, in which _
a transversely disposed channel-like track is pro
vided beneath the supporting frame, said frame
is provided with a roller to travel in said track,
a second channel-like track projects rearwardly 65
from the supporting frame. and the extension
frame has a supporting roller traveling in the
second mentioned track.
4. A typewriter attachment comprising: a
supporting frame adapted to be secured to the
rear of a platen carriage; an extension frame
slidably mounted for limited forward and rear
ward movement on said supporting frame, said
extension frame being provided with a longi
tudinal series of pairs of apertures; spring ‘means
urging the e'..'tension frame rearwardly; and a
carbon-holder provided with downwardly extend
ing studs adapted to engage a pair of apertures in
the supporting frame, said holder having blades
for securing the rear ends of carbon slips in in
terleaved relation with stationery strips led over
said device.
5. A device as speci?ed in claim 4, in which the
front end of the extension frame is provided with
10 transversely disposed guide rollers to engage the
edge portions of the supporting frame, and a
roller is provided at the rear end portion with a
depending roller for engagement with a rearward
extension of the supporting frame.
6. A device as speci?ed in claim, 4, in which
the front of the extension frame is provided with
a hook, and a latch bar adapted to engage and
hold said hook is fulcrumed in the supporting
frame so that downward pressure on the front
end of said bar by the stationery will release said
extension frame for forward movement.
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