US2337270A - Paper feed mechanism for business machines - Google Patents

Description

E.. RAcz Dec. 21, 1943.

PAPER FEED MECHANISM FOR BUSINESS MACHINES Filed March 28, 1942 3 Sheets-Sheet l E.l RACZ Dec. 21, 1943.

PAPER FEED MECHANISM FOR BUSINESS MACHINES Filed March 2K8, 1942 3 Sheets-Shedl 2 N INVENTOR. fgfwes Paez MMMMM E. RACZ Dec. 21, 1943.

PAPER FEED MECHANISM FOR BUSINESS MACHINES Filed March 28, 1942 3 Sheets-Sheet 3 INVENTOR. 'dwf HJQCZ jms. Mfwymm LUI i Patented Dec. 21, 1943 PAPER FEED MECHANISM FOR BUSINESS MACHINES Ernest Racz, Detroit, Mich., assignor to Burroughs Adding Machine Company, Detroit, Mich., a corporation of Michigan Application March 28, 1942, Serial No. 436,678

8 Claims.

This invention relates to paper feed mechanism for business machines. The invention is particularly applicable to tally roll mechanisms for calculating and the like machines although, as will become apparent hereinafter, the invention is also of wider applicability.

An object of the invention is to provide an improved paper feed mechanism for business machines.

A further object is to provide an improved tally roll mechanism for printing business machines, such as calculating and the like machines.

A further object of the invention is to provide means for providing a full feed of a paper in a machine upon each operation of the line-space mechanism by which said paper is advanced so that successive printed entries of a column of entries on the paper will be properly spaced Without one being printed partly over another.

Further objects and advantages of the invention will become apparent from the following description and drawings, in which:

Figure 1 is a longitudinal section through part of the rear portion of a Burroughs portable calculating machine showing the traveling paper carriage and the tally roll mechanism thereof in right-side elevation;

Fig. 2 is a right-side elevation of the tally strip fecd mechanism shown in Fig. 1 on an enlarged scale, showing the parts in their normal positions while the tally strip feed mechanism is in active or enabled condition;

Fig. 3 is a right-side elevation of a portion of the tally strip feed mechanism but showing the parts in the positions to which they are moved during the forward stroke of a machine cycle while the tally strip feed mechanism is in active condition:

Fig. 4 is a right-side elevation of portions of the tally strip feed mechanism showing the parts in the positions which they occupy while the machine is at rest with the tally strip feed mechanirm in inactive or disabled condition; and

Fig. 5 is a rear elevation of portions of the tally strip feed mechanism.

The invention has been illustrated by way of example only as applied to a Burroughs portable calculating machine having a traveling paper carriage. said machine being generally similar to that disclosed in my copending application Serial No. 269.386, filed April 22, 1939, which matured as Patent 2,317,086. April 20, 1943.

A well-known double ribbon mechanism, desig nated generally by the reference numeral (Fig. 1), is located between the type bars (not shown) of the usual printing mechanism of the illustrated Burroughs portable machine and a platen roller 2| mounted on a platen shaft 22 rotatably supported in a traveling paper carriage 23. The traveling carriage 23 is mounted for movement transversely of the machine on a raceway 24 supported on elevated lugs 25 on a plate 26 which also supports the ribbon mechanism 2D and is mounted on the upper rear portion of the machine. The tubulating and return movements of the carriage may be effected and controlled by any suitable means such as described and illustrated in my above-mentioned copending application.

Suitable record material, such as a continuous journal sheet 21, is adapted to be passed around said platen to receive records of the data and amounts entered in the machine and totals drawn therefrom. A supply roll 28 of journal strip 21 is supported between the side arms of a yoke member 29 mounted on a plate 30 secured to laterally bent lugs 3| (Fig. 5) on rearwardly extending side arms 32 of a bracket 33 secured to the underside of the raceway 24. From the supply roll 28, the journal strip 21 passes through a guide 34 on the rear paper table or chute 35 supported on the carriage, and around the platen, said sheet 21 being held in feeding relation to the platen 2| by a line of pressure rolls 36 yieldingly urged toward the platen below the printing line thereof.

For line-spacing the journal sheet 21, the machine is provided with the usual line-spacing mechanism comprising the line-spacing pawl 40 cooperating with a ratchet wheel 4| secured on the platen shaft 22, said line-spacing pawl being pivoted on a stud 42 which is carried by a pivoted arm 43 and projects into a slot in a member 44 secured to a. slide 45 which is mounted for forward and rearward movement on studs secured in the plate 26. The slide 45 has a depending lateral lug 46 which projects downwardly through openings in the plate and the top of the machine case and is formed with a slot receiving a stud 41 carried on a member 48. The member 48, as usual in Burroughs portable machines, is rocked clockwise, as viewed in Fig. 1, about a shaftl 49 during the forward stroke and returned counterclockwise during the return stroke of each machine cycle, whereby the slide 45 and line-space pawl 40 are moved rearwardly in the forward stroke and returned forwardly in the return stroke of each machine cycle,

A spring 50 urges the line-space pawl 40 toward engagement with the ratchet 4| so that the platen is advanced one or more line spaces during the return stroke of each machine cycle and after the operation of the printing mechanism which occurs, as usual in the Burroughs portable machine, near the end of the forward stroke of the machine cycle. The number of line-spaces through which the platen is advanced by the line-space pawl 40 in each machine operation is determined by the position of a shield 5| which is adjustable in a well-known manner by a 1inespace adjusting lever 52.

For some classes of work to be performed on the machine, it is desirable sometimes to prepare on a separate strip of paper an additional record of certain lists of data or amounts entered into the machine and totals drawn therefrom. For that purpose the machine is provided with a tally roll mechanism by which a tally strip 55 drawn from a tally strip supply roll 56 supported by a bracket 51 secured to the plate 30 may be fed upwardly between the two stretches of ribbon of the double ribbon mechanism between the platen and the type bars of the machine. The tally strip 55 drawn from the supolv rcll passes first through a tally strip feed mechanism, shown at the rear of the machine in Fig. l, and then through an opening 58 in the rear wall of the machine case and into the rear mouth of a stationary tally strip chute 59 which is located within the upper rear portion of the machine case and extends forwardly and upwardly with its discharge end extending upwardly through an opening in the upper portion of the machine case and so positioned as to direct the leading end of the tally strip issuing therefrom into the space between the two ribbon stretches. Above the ribbon stretches the tally strip 55 advances upwardly behind a stationarily mounted plate 60 against the upper edge of which the strip may be pulled to tear off lengths bearing records of desired groups of entries.

Tally strip feed mechanism The tally strip 55, as it leaves the supply roll 56, is passed under a guide plate 65 supported between the rearwardly extending side plates 65 of a yoke-shaped frame 61 (Fig. 2) secured to the bracket 33 and then passes forwardly between a tally strip feed roll and the pressure roll 1| (Figs. 2 and 3). The tally strip feed roll 10 is secured on a shaft 12 rotatably mounted in the side plates 86 and rotated for line-spacing the tally strip by means to be described later. The pressure roll 1| is mounted on a rod 13 (Figs. 2 and 3) supported in the forward ends of a pair of bell cranks 14 rockably mounted on a shaft 15 supported in the side plates 66. The rear arms of the bell cranks 14 are connected to springs 16 which urge the bell cranks 14 counterclockwise in Figs. 2 and 3 and thereby urge the pressure roll 1| toward the feed roll 10.

A plate 80 having lateral ears 8| by which it is rockably supported on the shaft 15 also has two lateral lugs 82 extending from the opposite sides thereof and overlying rear arms of the bell cranks 14. The upper rear portion of the plate 80 is engaged by a finger 83 extending from one end of a yoke member 84 pivoted on a shaft 85 which is supported in ears 86 formed on the plate 30. An arm 81 extending from the other end of the yoke member 84 is connected to one end of a spring 88 which has its other end connected to an arm 89 extending rearwardly from a second yoke member 90 which is pivoted on the shaft 85 and has a second arm 9| formed with a lug extending laterally behind the rear edge of the arm 81 of the yoke 84. The spring 88 is a relatively strong spring and normally holds the arm 81 with its rear edge engaged against the lateral lug of the arm 9| of the yoke 90. The yoke 90 has a third arm 9 2 with a forward cam end positioned under a stud 95 carried on the rear end of the slide 45 which, as previously mentioned, is moved rearwardly during the forward stroke of each machine cycle and then returned forwardly again during the return stroke of each machine cycle.

The stud 95 is shown in its normal position in Fig. 2 where it cams the forward cam end of the arm 92 downwardly so that the spring 88, holding the arm 81 in contact with the lug on the arm 9| of the yoke 90, presses the finger 83 on the yoke 84 against the plate 80 and, overcoming the tension of the springs 16, rocks the bell cranks 14 and lifts pressure roll 1| slightly from the feed roll 10, as indicated in an exaggerated degree in Fig. 2, suiiiciently to permit the operator easily to advance the tally strip as far as desired by simply pulling upward the free end of the tally strip emerging from behind the plate 60. In each machine cycle, as already mentioned, the stud 95 is moved rearwardly, thus permitting the cam arm 92 and the yokes 90 and 84 to be rocked clockwise (Fig. 2) and the plate and bell cranks 14 to be rocked counterclockwise by the springs 16, to press the pressure roll 1| against the feed roll 10 to grip the tally strip 55 in feeding relation to the feed roll for line-spacing.

The stud 95 also engages in a cam slot in the upper end of an arm 96 pivoted on a stud 91 secured in the right-hand side plate 66 and having pivoted thereon at 98 (Fig. 3) a line-space pawl 99 which is urged counterclockwise, as viewed in Figs, 1 to 4, by a spring |00 (Fig, 2) to urge the nose of the line-space pawl 99 toward engagement with the teeth of a ratchet wheel |0| secured on the feed roll shaft 12. When the parts are in the normal position of Fig. 2, a stud |02 secured in the right-hand side plate 56 engages a cam portion on the rear edge of the linespace pawl 99 to thereby hold the line-space pawl out of engagement with the teeth of the ratchet wheel, but rearward movement of the stud 95 in the forward stroke of each machine cycle rocks the arm 96 clockwise, thus retracting the pawl 99 upwardly and rearwardly so that the stud |02 permits the nose of the pawl to engage the teeth of the ratchet wheel. As the stud 95 moves forwardly during the return stroke of each machine cycle, the line-space pawl 99 is moved downwardly and forwardly by the arm 96 and rotates the ratchet wheel |0|, the feed roll shaft 12 and the feed roll 10 counterclockwise sufciently to advance the tally strip 55 one line-space before the stud |02, acting on the rear cam edge of the line-space pawl 99, again cams the latter out of engagement with the ratchet wheel just prior to the time that the forwardly returning stud 95 again lowers the forward end of the arm 92 to rock the yokes and 8|, plate 80 and the bell cranks 14 to lift the pressure roll 1| again away from the feed roll 10.

While the parts are in their normal positions, the feed roll 10 is held against reverse rotation by means of a pawl |05 which is pivoted on a stud |06 carried on a plate |01 and urged counterclockwise by a spring |08 to keep its nose in engagement with the ratchet wheel |0|. The plate 01 is rockably mounted on the feed roll ltated clockwise.

shaft 12 and pressed into frictional engagement with the face of the ratchet wheel |I by a spring |09 (Fig. 5) encircling the shaft 1.2 and compressed between the plate V|01 and the right-hand side plate 66. While the parts are in their norf mal positions, a stud |I0 secured in the plate |01 overlies the hooked lower end of the arm 81 to prevent clockwise rocking of the plate |01 about the feed roll shaft 12.' However, a twirler I|I can be manipulated by the operator either to advance the tally strip 55 as far as desired orl to retract the tally strip below'the printing line and disable the tally strip line-space means.

The twirler ||I is secured on the outer end of a sleeve I |2 which is telescoped over the end of a shaft |I3 rotatably mounted in the side plates 66. A pin II4 secured in the shaft |I3 extends through a short slot in the sleeve II2 to permit a short movement of the sleeve longitudinally on theshaft I I3 while compelling rotation of the sleeve I|2 and shaft II 3 in unison. A spring |I5 inserted within the sleeve I I2 between the end of the shaft 3 and the twirler normally holds the sleeve in its outermost position on the shaft. On the opposite end of the shaft |I3 is secured a pinion IIB (Figs. 4 and 5) which meshes with a pinion ||1 secured on the left end of the feed p roll shaft 12 whereby manual rotation of the twirler III causes rotation of the feed roll shaft 12 and feed roll 10.`

By manually rotating the twirler III clockwise, as viewed in Fig. 1, the feed roll 10 is rotated counterclockwise, and by manual rotation of the twirler I|| counterclockwise, the feed roll is romally held. away from the feed roll 10', such counterclockwise rotation of the feed roll would be ineffective to advance the -tally strip 55, andas the hooked lower end of the arm 81 normally engages under the stud I|0 on the plate |01, the pawl |05 normally prevents clockwise rotation of the feed roll. However, if the operator presses ltlfie twirler III inwardly on the shaft II3, i. e.;

As the pressure roll 1| is nortoward the right as viewed'in Fig. 5, a beveled cam collar |20 on the end of the sleeve I|2 engages a laterally extending cam lug |2|.on the arm 81 and'rocks the arm 81 and yoke 84 clockwise against the tension of the spring 88, thereby disengaging the hooked lower end of the arm 81. from the stud I I0 and moving the end of the nger 03 forwardly and permitting springs 1B to rock the plate 80 and bell cranks 14 to press theA pressure roll 1| against the feed roll 10.` While the twirler I I is thus held inwardly on the shaft |I3 and the tally strip 55 is gripped in feeding.

relation to the feed roll 10, the operator may rotate the twirler |I I either to advance thel tally strip or to retract it. A

If the operator now rotates the twirler counterclockwisa the feed roll 10 is rotated clock:y

wise to retract the tally strip 55 and, through the ratchet wheel |0I and pawl |05, the plate |01 is Arotated clockwise. Such clockwise rotation of the feed roll 10 can continue until the stud IIO on the plate |01 strikes against a stop member |22 (Figs. lvv and 4) adjustably secured to a depending portion of 'the bracket 33. If the tally strip has previously been torn off across the upper edge of the plate 60, such counterclockwise rotation of the twirler II I, if continued until the and the teeth of the ratchet wheel I 0|.

When engaged against the stop |22, the stud IIO is forward of a shoulder |29 on the end of the lower arm of afbell crank |21 which is pivoted on a stud m on the right-hand side plate se and is urged clockwise by a 'spring` |29. The upper arm of the bell crank |21 has a laterally turned lug |30 which is also engaged by the conical cam l0 |20 on the sleeve `||2 when the twirler IIlI is moved, inwardly so that the bell crank |21 is held inthe full-line releasing position of Fig. 4 while the twirler III is held at the end of its inward movement on the shaft II3. However, if the operator, after rotating the twirler III counterclockwise to the fullest extent permitted by the stop |22, releases the twirler III and permits it tobe moved outwardly on the shaft vI I3 by the spring II5, the retractionpof the conical cam |20 from the lug .|30 permits the spring |29 to rock the bell crank |21 to position the shoulder |20 behind the stud IIO to lock the plate |01 in the position of Fig. 4 with'the shield I25'in position to disable the line-space pawl 99.

'any record of such entries on the tally strip 55.

When, however, the work 4requires that there shall be made on the tally strip a record of the entries made on the journal sheet 21, the

operator may grasp theA twirler III and ,move it inwardly on the shaft |I3 to cam the bell crank |21 to the releasing position shown in full lines in Fig. 4 and lower the pressure roll 1I into engagementwith the feed roll 10 and then rotate .the twirler ||I clockwise to advance the tally strip 55. through .the ink ribbons and across the printing line to any desired extent and return the plate |01 to its normal position of Fig. 2 through the frictional engagement between the ratchet wheel I0| and theplate |01. When the operator again releases-the twirler I II and the latter is moved outwardly on the shaft I I3 by the spring |I5,. the lower hooked end of the arm 81 again engages under the stud IIO, thereby locking `the plate |01 in its normal position of Fig. 2 where the line-space mechanism is again effective to advance the tally strip 55 a line-space during each machine operation.

1 Means for insuring full line-spacing of the tally strip in each machine operation When returning the tallystrip to printing position across the printing line of the platen and restoring the tally strip spacing means' to effective condition or when otherwise advancing the `tally strip kby means of the twirler III, ity may happen that the operator will stop the rotation of the twirler at such a point that, at the end of the forward stroke of the next machine cycle, when the line-space pawl 99 is in its upper rearward position with its nose engaged against the ratchet wheel IOI, the ratchet wheel may be positioned so that the nose of the pawl V99 is at any point between rtwo, adjacent teeth of the ratchet wheel IOI instead of immediately behind a ratchet wheel tooth, as required for giving the feed roll and tally strip a full line-space movement during the return stroke of the machine cycle. -It will be remembered that the printing mechanism operates to print during the final portion of the forward stroke of the machine cycle and that the line-space movement of the feed roll 10 and tally lstrip 55 occurs during the return stroke of the machine cycle, so that if the feed roll and tally strip do not receive a full line-space movement during .the return stroke of the machine cycle, the item printed during the next machine cycle will not be properly spaced from the preceding item and may overlap it to a greater or lesser extent and thereby produce an imperfect record.

To insure proper spacing of the successive printing impressions on the tally strip, means are provided to insure that the tally strip will be advanced aA full line-space during the return stroke of each machine cycle, including the first cycle following manipulation of the twirler I by thevoperator. Such means includes a yoke member 35 (Figs. 1 to 4) which is rockably mounted on a stub-shaft |36 secured in the right-hand side arm 32 of the bracket 33 and is urged-.counterclockwise by a spring |31 (Figs. 2 and 4)`to hold a cam projection |38 on one side arm of said yoke in contact with the stud 95. A pawl |40 pivoted on a stud |4| on the side arm of the yoke |35 is urged counterclockwise by a spring |42 (Fig. 4) to hold a stud |43 on the pawl |40 engaged against an edge of the yoke |35.

During the forward stroke of each machine cycle the stud 95, as it is moved rearwardly, acts on the cam projection |38 'to rock the yoke |35 clockwise, thus moving the nose of the pawl |40 into engagement with the ratchet wheel The parts are so proportioned that if the ratchet wheel |0| is in such a position that the main linespacing pawl 39 could not advance the feed roll and tally strip 55 through a full line-space during the return stroke of the machine cycle, the pawl |40 will engage a tooth of the ratchet wheel |0| and advance the ratchet wheel just far enough, during the forward stroke of the machine cycle and as the stud 95 moves rearwardly, to position the teeth of the ratchet wheel |0| so that the regular line-spacing pawl 99 will be capable of advancing the feed roll 10 and tally strip 55 through a full line-space during the return stroke of the machine cycle. v

The proportions vand arrangement of the parts are also such that the position in which the ratchet wheel |0| is left at the end oi' each linespacing movement thereof by the line-spacing pawl 99, or after any movement thereof by the auxiliary pawl |40, is such that the auxiliary pawl |40 will fail to engage the rear face of any tooth of the ratchet wheel during the forward stroke of the machine cycle and, therefore, will not advance the ratchet Wheel and feed roll. It is, therefore, unnecessary to provide any further means for preventing rotation of the ratchet wheel |0| and feed roll 10 by the auxiliary pawl 40 when the main line-spacing pawl 99 is disabled by movement of the shield to the position of Fig. 4 by manipulation of the twirler During the forward stroke of the rst machine operation after the line-spacing pawl 99 is disabled by the shield |25, the auxiliary pawl |40 may advance the ratchet wheel |0| and feed roll 10 a fraction of a line-space but will leave the ratchet wheel in such a position that, during the following machine cycles, the auxiliary pawl |40 will fail to advance the ratchet wheel and feed roll further. The tally strip will, therefore, remain in its retracted nonprinting position until returned to printing position by the operator through further manipulation of the twirler While the construction above described is admirably suited forthe purposes of the invention, it will be readily understood by those skilled in the art that the invention is capable of embodiment in various constrcticnal forms and may be applied to various styles and types of machines other than the Burroughs portable machine which has been referred to by way of example only.

I claim:

1. Paper feed means for business machines, comprising a feed roller, means to effect feeding engagement of a paper with said roller, a toothed ratchet wheel coupled with said roller to drive the latter, a drive member cooperable with the teeth of said ratchet wheel to advance said ratchet wheel, roller and paper step by step upon successive operations of said drive member, re-

-peatedly operable means to operate said drive memberrand auxiliary means operable by said operating means to act on said ratchet wheel to advance it to a position, when it is not already so positioned as said operating means is operated,

from which said ratchet wheel together with said roller and paper can be advanced a full feeding step by said drive member.

2. Paper feed means 4for business machines, comprising a feed roller, means to effect feeding engagement of a paper with said roller, a toothed ratchet wheel coupled with said roller to drive the latter, a feed pawl cooperable with .the teeth of said ratchet wheel and movable in an idle stroke in one direction and in a feed stroke in the opposite direction to advance said ratchet wheel, roller and paper a predetermined extent upon each reciprocation, means to reciprocate said pawl, and an auxiliary pawl cooperable with said ratchet wheel and moved by said reciprocating means in one direction as said feed pawl moves in its idle stroke to advance said ratchet wheel to a position, when it is not already so positioned as said reciprocating means is operated, from which said ratchet wheel together with said roller and paper can be advanced a full feeding step by said feed pawl in the following feeding stroke thereof.

3. In a business machine having means for driving it through cycles of operation, a printing mechanism, and a member moved by said driving means in each machine cycle, a paper feeding means comprising a feed roller, means to effect feeding engagement of a paper with said roller, a Ytoothed ratchet wheel coupled-with said roller, a memberreciprocated by said moved member in each machine cycle, a feed pawl on said reciprocated member and movable thereby in an idle stroke in one direction prior to operation of said printing mechanismin a machine cycle and in a feed stroke in the opposite directionafter operation of said printing mechanism in said machine cycle 'to advance said ratchet wheel, roller and paper a predetermined extent, and an auxiliary pawl on said reciprocated member and moved thereby in one direction, as said feed pawl is moved in its idle stroke, to advance said ratchet wheel to a position, when it is not already so positioned as said reciprocating means is operated, from which said ratchet wheel together with said roller and paper can be advanced a full feeding step by said feed pawl in the following feeding stroke thereof.

4. Paper feed means for business machines, comprising a feed roller, means to eifect feeding engagement of a paper with said roller, a toothed ratchet wheel coupled with said roller to drive the latter, a drive member cooperable with the teeth of said ratchet wheel to advance said ratchet wheel, roller and paper step by step upon successive operations of said drive member, re-

peatedly operable means to operate said drive member, manipulative means to rotate said feed roller to advance said paper to variable extents,`

and auxiliary means operable by said operating means to act on said ratchet wheel prior to cowlieel, when the latter is left by manipulation of said manipulative means in a position from which said ratchet wheel together with said roller and paper cannot be advanced a full feeding step by said last-mentioned moved member operable means when said manipulative means is manipulated to return said paper into record producing A relation to said printing mechanism.

' operation of said drive member with said ratchet '1..1n a business machine having a printing mechanism and a member moved in operation of the machine, a paper feed means comprising a feed roll, pawl and ratchet means to rotate said feed rollin paper advancing direction, means to effect feeding engagement of a paper with said feed roll, means operable by said moved member i in operation ofthe machine to oscillate said pawl `to advance said paper relative to said printstroke in one direction and in a feed stroke in the opposite direction to advance said ratchet wheel, roller and paper step by step a predetermined extent upon each reciprocation, means to reciprocate said' pawl, manipulative means to rotate said feed roller to advance said paper to variable extents, and an auxiliary pawl cooperable with said ratchet wheel and moved by said reciprocating means in one direction as said feed pawl moves in its idle stroke to act on said ratchet wheel when the latter is left, by rotation of said feed roller by said manipulative means, ina position from which said ratchet wheel together with said roller and 'paper cannot be advanced a full feeding step by said feed pawl in the following feeding stroke thereof, to advance said ratchet wheel to a position from which it, together with said feed roller and paper, can be advanced a full feeding stroke by the following feeding stroke of said feed pawl.

6. In a business machine having a printing mechanism and a member moved in operation .of the machine, a paper feed means comprising a feed roll, means to yeffect feeding" engagement of a paper with said feed roll, means normally disabling said engagement-meeting means,

means operable by said moved member in oper ing mechanism, manipulative means*r to retract said paper from and return it to record producing relation to said printing mechanism, means movable by said manipulative means to a position to disable said pawl from engaging said ratchet when said manipulative means is manipulated to retract said paper and to return to normal inactive position when said manipulative means is manipulated to return said paper into record producing relation to said printing mechanismand means controlled by said manipulative `member to lock said disabling means in disabling position after retraction of said paper and to unlock saiddisabling .means for return to normal inactive position preparatory to return of said paper into record producing relation to said printing mechanism.

8. In a business machine adapted to be given cyclesof operation and having a printing mechanism anda `member movedin each cycle of operation of the machine, a paper feed means comprising a feed roll, normally disabled means' to eifect feeding engagement of a paper with said s to disable said engaging means after said rotation of said feed roll, manipulative means to ref tract said paper from and return it to record producing relation to said printing mechanism,

-said enabling and disabling means being also operable by said manipulative means to enable said engaging means prior to retraction or returnof said paper and todisable said engaging means after retraction or return of said paper by said manipulative means, and means operable by said manipulative means to disable said moved-member-operable means when said manipulative means is manipulated to retract said paperv and to re-enable said moved-member-4 operable means when said manipulative means is manipulated to return said paper into record producing relation to `said printing mechanism.

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