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Патент USA US3026996

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March 27, 1962
R. GATHER
3,026,987
RIBBON FEEDING DEVICE FOR TYPEWRITING MACHINE
Filed Sept. 15, 1960
2 Sheets-Sheet 1
Fig.7
Fig. 2
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73
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March 27, 1962
R. GATHER
3,026,987
RIBBON FEEDING DEVICE FOR TYPEWRITING MACHINE
Filed Sept. 15, 1960
2 Sheets-Sheet 2
Fig.3
22
20 35 34 33 3
27
28 29
23
25
26 29 27 44
Fig.5
32 33 34 35
27 37 36 20
//7 (re/7 for
800/04?’ 202% er
75'
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B?ih?d?
Patented Mar. 27, 1962
it
which like reference numerals designate like parts
3,026,987
throughout the ?gures thereof, and wherein:
FIG. 1 shows an embodiment of the invention inside
RIBBQN FEEDING DEVH€E 170R TYPEWRITENG
MACHINE
Rudoif Gather, 61 Mulgaustrasse, Rheydt
elevation;
FIG. 2 is an enlarged view of a portion of the device
of FIG. 1;
FIG. 3 illustrates the apparatus of FIG. 2 in plan
@denisirchen, Germany
Filed §ept. 13, 19st), Ser. No. 55,644
4 ‘Claims. (6!. 197-153)
view;
This invention relates to a device for providing a ribbon
FIG. 4 is a fragmentary side-elevational view of the
feed in a typewriting, tabulating or like machine. The 10 apparatus of FIG. 2; and
invention has been developed in connection with providing
FIG. 5 is a front elevation of the apparatus of FIG. 2.
a device which can be used as an attachment for an exist~
The example of the invention shown in the drawings is
ing machine (as is speci?cally referred to hereinafter)
in the form of a device which can be attached to an exist
but it will be understood that the invention is not limited
to this case as it may also be incorporated in a type
ing machine, which may for example, be a tabulating
15 machine, and for this purpose there is provided for the
writing or like machine as part of the original machine
itself.
As an attachment for an existing machine the present
end parts 11 by means of which the complete device can
be mounted upon a tabulating machine so as to position
invention aims at increasing the copying capacity of the
it adjacent to the platen roller 1 of the machine shown in
device an elongated attachment bar it) having detachable
machine. In a typewriting or like machine there is the 20 FIG. 1.
usual ribbon for producing the top copy and then further
At one end, the attachment bar It} has a bracket 12
copies are produced by the use of appropriate carbon
which at the top is provided with a member 13 around
papers or webs but there is a limit to the number of
which the ribbon 14 is trained to reverse its direction of
carbon copies which can be produced in this way, this
movement and at the other end the attachment bar has
limit being dictated by the thickness of the composite 25 another bracket 15 provided at its upper end with a ribbon
paper web passing round the platen of the machine, and
guide 16 which‘ may be of any convenient form and is
with existing machines four or ?ve carbon copies is the
adapted to be opened to separate the outgoing and in
maximum which can be satisfactorily produced.
An
attachment incorporating the present invention would
coming lengths of ribbon when the attachment is being
provide one or more extra runs of ribbon to produce
set up and copy paper is being inserted in the machine to
pass between the two runs of the ribbon.
further copies without the use of extra carbon paper.
The bracket 15 has secured thereto a suitably shaped
According to the present invention I provide a device
arm 17 and to the outer end of the arm 17 the gear box
and driving unit 18 is Secured.
for feeding a ribbon in a typewriting, tabulating or like
machine comprising a pair of spools upon which a ribbon
The unit 18 may be completely enclosed in a suitable
is wound and which act in alternation as supply spool 35 casing which is not shown in the drawings and on the
and take-up spool, power operated means for selectively
exterior of this casing the controls for the device may be
driving one or the other of said spools independently of
mounted and such controls may include an electric switch
for the supplyof current and a speed controller for the
the typing action of the machine, and means for auto
driving motor.
The gearing of the device is mounted between a pair
come exhausted.
of spaced plates 26} at the rear and 21 at the front, these
The driving means may comprise an electric motor and
being secured to the arms 17 and in FIG. 3ythe‘driving
motor is indicated generally at 22.
the automatic reversing means may comprise an electric
switching device which is actuated by means of engage
The output shaft from the driving motor is indicated
ment by one or the other of two trigger pieces carried by 45 at 19 and has ?xed thereon a pinion 23 which is in con
the ribbon, one near each end of the ribbon.
stant mesh with a pinion 24 carried between the arms of
a yoke 25 which is pivoted about an axis of the shaft
In order to maintain the ribbon taut during its feeding
1? so that the pinion 2.4 swings about the axis.
movement a braking device may be provided adapted to
The two spools for the ribbon are shown at 26 and 27
operate so as to exert a braking effect upon whichever
spool is for the time being acting as the supply spool and
and each spool is driven by its associated shaft by means
matically reversing the direction of feed of the ribbon
when the currently-acting supply spool is about to be
40
is being rotated by the ribbon being pulled therefrom.
of one or more projecting studs 28 carried by ?anged
According to a further aspect of the invention I provide
a device ‘for feeding a ribbon, asan attachment for a
typewriting, tabulating or like machine, comprising an
attachment bar adapted to be mounted upon the machine 55
collar 29 secured to'the shaft, the shaft end being ar
adjacent‘ to the platen thereofand having at its ends
brackets carrying ribbon guidesv through and around
which the ribbon is trained, and a, casing supported from
ranged for a suitable type of spring retaining clip. The
shaft for spool 26 is shown at 3% and the shaft for spool
27 is shown at 31 in FIG. 3.
Referring to FIG. 5 the shaft 3% has ?xed thereon a
gear wheel 32 which has as its rear face a friction sur
one end of said attachment bar, said casing carrying a
pair of spools upon which a ribbon is wound and which
face, forming one half of a slipping clutch the other half
of which is‘ formed by the friction disc 33 ?xed to spacer
disc 34 in turn ?xed to‘ gear wheel 35 which is 'slidable
are adapted to act alternately astake-up and supply spools,
upon the shaft 30% and is‘loosely mounted thereon
Friction disc 33 and gear wheel 32 are pressed re
power-operated means for selectively driving one of the
siliently together by means of the spring arm 36 which
other of said spools independently of the operator of the
is anchored at its lower end to the rear plate 20 and the
machine and means for automatically reversing the direc
tion of travel of the ribbon when the currently-acting 65 spring pressure of which can be adjusted by means of the
adjusting screw 37. The shaft 31 of the other spool has
supply spool is almost exhausted.
?xed thereon a gear wheel 38 and a further gear wheel
Other features and many of the attendant advantages
39 which is in mesh with the gear Wheel 35.
of this invention will be readily appreciated as the same
Two toggle switches 4d are indicated in FIG. 3 for
becomes better understood by reference to the following 70 controlling
the direction of rotation of the driving motor
detailed description of a preferred embodiment when con
22 and these are adapted to be operated by switch arms
sidered in connection with the accompanying drawing in
41 ?xed upon a spindle 42 which extends through the
3,026,987
3
4
two plates 29 and 21 and in front of the gear box has
said spools for rotation thereof independent of the typing
?xed thereon a rocker arm 43 which at its upper and
action of said machine.
2. A device for feeding a ribbon in a typewriting ma
lower ends carries ribbon guides 44-.
The ribbon 14 is passed over a plurality of guide rolls
46 and through the guides 44 and near each end of the
ribbon there is ?xed a trigger member which consists of
a small piece of metal 45 which may pass over the rolls
chine and the like, comprising a support; two shafts ro
tatable on said support; a pair of spools respectively
mounted on said shafts for rotation therewith; a ribbon
Wound on said spools, said ribbon having two ends re
46, but is too thick to pass through the ribbon guide 44
spectively secured to said spools whereby said spools
act as a supply spool and a take-up spool respectively;
so that when one spool is exhausted the trigger 45 en
gages the guide 44- thus rocking the rocker arm 43 and 10 two friction discs mounted on said support for joint ro
tation With said shafts; resilient means for permanently
causing the spindle 42 to turn and by means of the arms
urging said friction discs into braking engagement; power
41 operate the appropriate toggle switch to reverse the
operated driving means; and means sensitive to the
direction of rotation of the driving motor.
amount of said ribbon on one of said spools for alter
Considering the position shown in FIG. 2 it will be
observed that the yoke 25 is across to the left so that 15 natingly engaging said driving means with one of said
spools for rotation thereof independent of the typing
pinion 24 is meshing with the gear wheel 32 and thus the
spool 26 is acting as the take-up spool and is being
driven, while the ribbon 14 is being drawn off the other
spool 27 which is acting as the supply spool and the posi
tion has been reached where the trigger member 45 is
action of said machine.
3. A device for feeding a ribbon in a typewriting ma
chine and the like, comprising a support; two shafts ro
tatable on said support; a pair of spools respectively
mounted on said shafts for rotation therewith; a ribbon
about to engage the ribbon guide 44. Under these con
wound on said spools, said ribbon having two ends re
ditions the spool 27 is being driven in the same direction
spectively secured to said spools whereby said Spools act
as the spool 26 and thus the gear wheel 39 is being
as a supply spool and a take-up spool respectively; two
driven in this direction and is therefore rotating the gear
wheel 35 in the opposite direction. Hence friction disc 25 friction discs mounted on said support for joint rotation
with said shafts in opposite directions when said spools
33 is rotated in the opposite direction to the friction
rotate to unwind said ribbon from the supply spool and
face on gear wheel 32 and therefore a braking effect is
to wind it on the take-up spool, said friction discs having
transmittted to the supply spool 27 thus ensuring that
radially extending friction faces; resilient means for
the ribbon is maintained taut as it is pulled off spool 27.
When the trigger member 45 engages ribbon guide 44 30 permanently urging said friction faces into braking en~
gagement; power operated driving means; and means
and the drive is reversed rotation of pinion 23 is reversed
sensitive to the amount of said ribbon on one of said
and thus causes the yoke 25 to swing to the right and
spools for alternatingly engaging said driving means with
bring pinion 24 into mesh with gear wheel 38 as shown
one of said spools for rotation thereof independent of
in FIG. 4. Thus spool 27 now becomes the take-up
spool and being positively driven and spool 26' becomes 35 the typing action of said machine.
4. A device for feeding a ribbon in a typewriting
the supply spool driven in the same direction. Gear
machine and the like, comprising a support; two shafts
wheel 39 is driving gear wheel 35 in the opposite direc
rotatable on said support; a pair of spools respectively
tion so that again the friction disc 33 and friction face
mounted on said shafts for joint rotation therewith; a
on gear wheel 32 are rotated in opposite directions and
a braking effect is being exerted upon spool 36 to retain 40 ribbon wound on said spools, said ribbon having two
ends respectively secured to said spools, whereby said
the ribbon taut as it is drawn on” the spool.
spools act as a supply spool and a take-up spool respec
The movement of the ribbon and reversing of its di
tively; two friction discs mounted on said support for
rection of movement is therefore independent of the typ
joint rotation with said shafts in opposite directions when
It should be understood, of course, that the foregoing 45 said spools rotate to unwind said ribbon from the supply
spool and to wind it on the take-up spool, said friction
disclosure relates to only a preferred embodiment of the
discs having radially extending friction faces; resilient
invention and that it is intended to cover all changes
means for permanently urging said friction faces into
and modi?cations of the example of the invention here
ing operation being performed by the machine.
braking engagement; electrically operated driving means;
in chosen for the purpose of the disclosure which do not
constitute departures from the spirit and scope of the in 50 switch means sensitive to the amount of said ribbon on
one of said spools for reversing the direction of driving
vention set forth in the appended claims.
movement of said driving means; and means responsive
What I claim and desire to be protected by Letters
to reversal of said direction of movement for alternative
Patent of the United States is:
ly engaging said driving means with said one spool for
1. A device for feeding a ribbon in a typewriting ma 55 rotation thereof independent of the typing action of said
chine and the like, comprising a support; a pair of spools
machine.
rotatable on said support; a ribbon wound on said spools,
_ References Cited in the ?le of this patent
said ribbon having two ends respectively secured to said
spools whereby said spools act as a supply spool and a
take-up spool respectively; electrically operated driving
UNITED STATES PATENTS
60
means; switch means sensitive to the amount of said rib
bon on one of said spools for reversing the direction of
driving movement of said driving means; and means re
sponsive to reversal of said direction of movement for
alternatingly engaging said driving means with one of 65
2,419,369
Ritzert ______________ __ Apr. 22, 1947,
2,636,590
Rice ________________ __Apr. 28, 1953
2,695,698
2,789,676
2,803,331
2,872,016
Henry ______________ .._ Nov. 30,
Grundel ____________ __ Apr. 23,
Berill _______________ __ Aug. 20,
Sharp ________________ _- Feb. 3,
1954
1957
1957
1959
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