US2315731A - Paper feeding device - Google Patents

Description

April 6, 1943. R. E. PARIS PAPER FEEDIN G DEVICE Filed Dec. 17, 1940 2 Sheets-Sheet l ATTORNEY.

April 6, 1943. R. E. PARIS 2,

PAPER FEEDING DEVICE Filed Dec. 17, 1940 2 Sheets-Sheet 2 FIG. 9. A f i FIG.11. E

ATTORNEY.

Patentcd Apr. 6, 1943 UNITED STATES PATENT OFFICE PAPER- F'EEDING DEVICE Robert E. Paris, New York, N. Y., asaignor to Intemational Business Machines New York, N. Y., a corporation oi New York Application December 17, 1940, Serial No. 370,497

15 Claims. (Cl. 197-133) This invention relates to record feeding devices and more particularly to improved pin feeding devices for feeding a perforated record in accurate registry relative to recording devices and also to control manifolded and superposed record sheets so that they are moved together in accurate alignment.

It has been found difllcult to maintain registration when single or multiple sheets are fed by friction feeding means, especially when the sheets are preprinted with forms or blocks having definite allotted spaces for lines of recording. Positive pin feed devices havebeen found to give better results, but simple pin wheels tear the margins of the perforations and fail to give true alignment due to the divergent radial angle of projection of the pins. And the more elaborate pin feed devices of the prior art either involve impositive springs, or are expensive to manufacture and assemble. Therefore, it is the object of the present invention to provide an improved pin feed device, positive in operation, proportioned mathematically to be mechanically perfect, and yet inexpensive to make.

It is an object of the invention to arrange a series of pins around a circular holder or platen and shape the ends of the feeding pins as involute shaped claws or hooks, conforming to the involute path taken by the circular margins of the feed perforations as the record sheet is wrapped on or off the feed roller or platen. of

7 course, the curved path followed by the perforation as the sheet is wrapped on a roller is the reverse of the path taken as the sheet is drawn off the roller. Therefore, a pin rotating means is provided to successively twist or turn the curved pins through an angle of 180 so'that the pins are eifective in engaging the sheets without tearing them and equally as effective in worming out of the sheets as the sheets are disengaged without being caught or torn on the pins.

It is a further object of this invention to provide pin feed devices with pins having hooked or curved ends of an oval or elliptical cross-section, said pins being proportioned with the long axis of the oval at right angles to the direction in which the hook is pointed. The pins are so designed in order that they can shift superposed sheets into alignment and then, at the critical recording position, the long axis of the elliptical section is placed parallel with the direction of feed, so that the sheets are held especially close with respect to the position from line to line. Lateral sheet adjustment is made when the pins enter the sheets and longitudinal adjustment is Corporation,

made when the pins turn of the The pin is arranged to enter the sheet or sheets with the elliptical section permitting some loose play backward and forward. However, when the pin approaches the recording line, or a position having control thereover, the pin is twisted through an angle of 90 and the long axis of the elliptical section is directed parallel with the line of motion to prevent any appreciable forward or backward shifting at the recording position.

Another object of the present invention is the provision of an improved pin feed device including a succession of feeding pins pivotally mounted and each formed eccentrically with respect to its pivot. This last mentioned advantage is especially useful where quite a number of duplicate copies are to be fed and the record sheets build up to an appreciable thickness. When such a pile of sheets is drawn around a curved surface, it is realized that the feed perforations therein can be aligned perfectly along only one radial line drawn from the origin of the curve. The perforations in the upper sheet creep, or are staggered, away from alignment with the holes in the lower sheet a progressively greater extent, the further the distance around the curve away from the line of alignment. To take care of the condition mentioned, a pin is proportioned eccentrically so that it may be disposed to clear the creeping sheets, the perforation walls of which form angular or oblique cylindrical openings rather than true cylindrical openings through the pile of sheets. With the thickness of the pile known, and the diameter of the perforations given, it is possible to calculate the necessary amount of eccentricityand the proper proportions of the pins to avoid tearing any of the multiple sheets fed by said pins. v

An object of the inventionis the provision of an improved pin feed device with pins pivotally mounted on radial axes, said pins being shaped as claws or hooks and of elliptical cross-section with the long axis disposed at right angles to the direction of the hook and locatedeccentrically with respect to the pivot, said eccentricity being off center in the direction of said hook.

Another object of the invention is the provision of curved and pivoted pins of elliptical crosssection for engaging the perforated records with the rotating elliptical portion in such a fashion that the sheets are adjusted from side to side into alignment across the width and also adjusted back and forth into alignment with respect to the length of the sheets.

A further object of the invention is the provision of a pin feed device adapted for use when separated from a platen or feed roller and mounted adjacent thereto for cooperation in feeding continuous records. When the pin feed device is placed between the forward and return paths of an endless sheet, the pins thereon engage the web in two places in order to convey the sheet to the recording position and also retract it away from the operating position to reduce the strain on the web. Smooth feeding operation is assured by properly placing the pin turning means at regular or irregular intervals to cooperate efiiciently with the desired path of the web.

A still further object of the invention is the association of Geneva operating controls with the pins of a feeding device to govern their posi-' tion and operation.

Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. 1 is an enlarged elevation view showing the cooperation of the curved pin with a pile of record sheets and the manner in which the curved pin is properly retracted from the webs as they are drawn off a feed roller.

Fig. 2 is a sectional plan view showing the construction of the pin mounting means and the pin turning devices as viewed from above the showings in Figs. 1 and 4.

Fig. 3 is an elevation view, partly in a section. showing the construction of the pin with the Geneva pinion and locking shoulder attached thereis desired.

culating the proper proportions of the elliptical form of the feeding pin.

A feed roller 25, Fig. 2, may be part of an ordinary typewriter or it may be employed in various other kinds of recording machines, as for example tabulating or billing machines and wherever control of feeding and aligning of record sheets If the machine includes auxiliary feed rollers or pressure rollers, they are thrown 01! while the positive feed devices are used. The feed roller may be turned by hand, through the usual ratchet and pawl line space devices, or by more complicated feed devices such as those disto. The position in which the pin is shown is the one assumed just before the pin is turned.

Fig. 4 is a side elevation view of one pin feed device showing the cooperation of the curved and turning pins with a record sheet.

Fig. 5 is a detail sectional view taken along the line 55 in Fig. 1 and showing the disposition of the elliptical cross-section of a pin after it has passed the recording .control position.

Fig. 6 is a detail view taken along line 6-6 in Fig. 1 and showing the position of the elliptical cross-section of a pin when it engages the record sheets at the critical recording position.

Fig. 7 is a side elevation view showing the pin feed device positioned between advancing and returning portions of the record sheets which are engaged at two points to insure their conveyance around the platen appearing below the feed device.

Fig. 8 is a side elevation view showing a feed device cooperating directly with a grooved platen feed roll around which record sheets are drawn.

Fig. 9 is an enlarged side elevation view of another modification of the feed devices showin the cooperation of pins which are both curved and eccentrically mounted. This view also reveals how retraction of such pins appears when cooperating with a pile of perforated records having an appreciable extent of creep while feeding around a curved feed roller.

Fig. 10 is a sectional detail view taken along the line Ill-J0 in Fig. 9 and showing the proportions and disposition of the eccentric elliptical pin in engagement with staggered perforations in the creeping pile of record sheets.

Fig. 11 is a diagrammatic showing of the staggered perforations and is of assistance in cal- 75,

closed in the Carroll Patent 2,066,305.

Although it is thought preferable to utilize the present invention for the feeding of record sheets having rows or series of marginal preformed feed perforations at both sides, it is contemplated that a one sided feed could serve in some instances. Interleaved carbon strips are used when there is no deposit of duplicating material on the backs of the records.

Wherever the parts are similar in the various views, the same reference characters are used.

In the forms shown herein, the feeding pins in addition to being shaped to conform with the radius of curvature of the record material, while advancing onto and being withdrawn therefrom, also have a pivotal or turning movement to accurately align the material. The-pins are elliptical in cross-section and may be mounted eccentrically to register the record material, especially when there are many webs comprising a comparatively thick pile of material to be fed.

.Referring to the modification shown in Figs.

1-6, it s seen that the feed roller 20, which may,

be also used as a platen. is mounted upon and afilxed to a shaft 2i, Fig. 2. This shaft is supported in a fixed bearing block 22 with an extending collar 23. Attached to roller 20 by rivets, such as rivet 24, is a pin carrier comprising a cover 25, a pin holder 26 and a pin retainer 21. The pins are formed with an outer involute curved hook 28, a rotating pinion 29, a Geneva locking shoulder 30 and an inner pivot portion 3|.

The series of pins 28 (eight in the present instance) are arranged radially and the shanks or pivots 3| are placed in radial grooves cut into the side of holder 26. The grooves are semicircular opening conforming with the arcuate shape of pivots 3| and open at the side to permit the easy assembly of the pins before the retaining plate 21 is fastened against the side of the holder 26. The pins are assembled by first extending the hooked outer portions 28 through the circular part of the cover 25. The openings in the outer periphery of cover 25 are of a circular shape and the bottom portion of the hooks 28 conform therewith to make a dust proof rotating point for the feeding devices. It is apparent that the pins are held in a radial position but free to rotate therein as guided by the openings in the cover 25 and the grooves in the holder 25.

Adjacent the retainer 21, Fig. 2, is a fixed operating plate 32 within a cover 3, both the plate and the cover being fastened to the fixed bearing block 22 by means of rivets 24. The outer periphery of cover 33 is made concentric with the other cover 25 and the edge is arranged contiguous with the edge of cover 25 to form a dust proof separation between the stationary and rotating por tions of the feeding device.

Around the periphery of the operating ring 32, Fig. 2, certain portions are provided with means for turning the pins to arrange the hooked pins thereof in positions to engage or disengage the record sheets 35. In Fig. 4, it is seen that, for the kind of feeding operation shown, two pin turning stations X and U must be provided and arranged at 180 intervals at the opposite sides of a horizontal line drawn through the center of the operating shaft 2|. One of such operating stations is shown in Fig. 3, where it is seen that a pair of pins 36 project outwardly in the path of a tooth on the four sided pinion 29 forming part of the feeding pin 28. Since the outer diameter of the operating plate 32 is proportioned to lie directly under the gear 29, the gear travels freely thereover in a circular path until one of the teeth strikes the foremost pin 36 which then serves to turn the gear in a counterclockwise direction until the second tooth is engaged by the other pin 56 to complete the turning movement through an angle of 180 alongside the pins 36. The operating plate 32 is cut away with an arcuate notch 31 conforming with the curved portion of looking shoulder 30 on the shank of the pin. Normally, one of the flat portions of shoulder 30 cooperates with the smooth inner surface of operating plate 32. However, at the points selected for turning movement, the bar fits into a groove 31 while gear 23 is being operated by the stationary pins 36. By means of the Geneva operating connections, the pins are held in adjusted position and operate positively at all times.

It will be understood that the operating station comprising pins 36 and groove 31 may be placed wherever desired and repeated any number of times to get the proper direction of the hooked pins at all record engaging and disengaging points. In Fig. 4, it is noted that the operating station at If is provided to turn the pins there so that when they move counterclockwise and enter the marginal perforations of the sheet 35 at Y, they will be facing in the proper direction. And the other operating station at U is provided, not only aligning the sheets longitudi nally at the printing point, but also to turn the pin ends further so that when they arrive at the position V, the hooks will be in the proper position to come out of the marginal perforations without tearing the sides of the paper.

Figure 1 shows on a larger scale, the reason for the involute shape and the elliptical crosssection of the pin. When a series of sheets are wound around the feeding roller 20, it is evident that the outer ones and the perforations therein creep further and further away from a true radial position with respect to the center line of the pins. This is shown graphically at the top of the feeding roller 20 (Fig. l). The involute paths followed by the margins of the circular perforations when leaving the roller 20 are outlined by the dotted lines All conforming generally with the hooked shape of the pin 28 which at the time is slanted in a retracted backward direction.

At the other point U, Fig. 1, which is the recording position, or a position corresponding therewith, the reason for the elliptical section of pins 28 is shown graphically. There it is noted that the base of the pin fills out the space inside the marginal feed perforations and when doing so, the pins insure the correct longitudinal position of the sheets 35. This is also shown in Fig. 6 where the plan view of the section of the pin makes it clear that the sheet 35 is held from moving up and down. On sheets having preprinted horizontal lines or an arrangement of forms, the longitudinal positioning of the sheets is especially critical in order to place the printing properly with. respect to the preprinted matter. The lateral positioning of the sheets is also important and that is taken care ofv as shown in Fig. 5 where it is seen that the elliptical section of the pin occupies a position with the long axis of the ellipse extending in a horizontal direction. Since certain of the pins are positioned as shown in Fig. 5 at the same time that a pair of pins are turned as shown' in positionU in Fig. 1, at opposite sides of the sheet, it is evident that the sheets are aligned in both lateral and longitudinal directions while printing takes place.

Although the path 40, Fig. 1, is mentioned with respect to the disengagement of the pins on the paper, it is apparent that a similar path is described when the record sheets are wound on the feed roller. Because of the similarity of these two paths, it is possible to use the same shape of the pins to aid in engaging the paper as well as operate eiliciently while being disengaged from the paper, the only difference being that the pins are turned in the right direction as shown at Y in Fig. 4 to follow the marginal perforations of the sheet as they are wound onto the roller.

Although in some instances a singl feeding device such as that shown in Figs. 2 and 3 is suilicient to convey one or more webs of record material, there are other instances when two or more such devices are needed to engage marginal openings or openings at other points along the webs of the record sheet. In such cases, it is obvious that the devices can be repeated by duplicating or multiplying the parts shown. It

is understood also that the shaft 2| is to bedriven by any well known line spacing or long feeding devices in the art. In order that the feeding devices may be advanced manually, a knob ll is attached to the end of shaft 2|. The long feed distances may be proportioned in multiples of the distance between the feed pins so that the records are aligned in the starting position and other critical positions by pins at the recording line as at U in Fig. l.

The feeding arrangements already discussed are concerned primarily with the association of the novel pin feeding devices in direct association with a platen. As shown in Figs. 7 and 8, it is apparent that the devices are also adapted for use when the platen or feed roller is separated from the feeding devices. In Fig. '7, it is seen that a platen 20a is located below the feeding roller 20 which is suspended between arms 42, and the problem is to convey a record sheet or sheets 35 to and from the platen. In order to do this, four pin turning stations E, F, G and H are provided. The pins not only feed the sheets to the printing line and hold them there in positive fashion but they also serve to provide an amount of slack to decrease the force required to carry the sheets around the platen.

Th other feeding arrangement shown in Fig. 8 involves the direct cooperation of the feeding roller 20 with another feeding roller or platen 20b. The platen is cut out with grooves 43 into which. the pins 28 project when cooperating with the record sheets 35. For this direct feed cooperation, the pins do not remain in contact with the paper and it is not necessary to have many pin turning operating stations. It is evident that only two operating stations are needed, one to turn the pins while they are in cooperation with the marginal perforations of the sheet and the grooves 43 of the platen and the other to turn the pins while they are free from the record sheets.

In both instances illustrated in Figs, 7 and 8, the feeding arrangements take advantage of the elliptical cross-section of the pins to align the sheets longitudinally as described with reference to the point U, Fig. 1.

Figures 9, 10 and 11 are illustrative of a modified kind of feeding device such as those described hereinbeiore. The difference lies in the eccentric mounting of th elliptical portions of the feeding pins. In Figs. 9 and 10, it is seen that not only are the pins 28a shaped to conform with an involute curve and not only are they of an elliptical cross-section, but they have the further distinction of being shaped so that the center of the elliptical portion is shifted to be eccentric with respect to other portions of the pin which include the part extending through the cover 25, Fig. 2, th pinion 29 and the pivot portion 3|. As shown near the top of Fig. 9, the center line C running through the long axis of the ellipse is displaced eccentrically with respect to the line D running through the normal axis of the pin mounting. The reason for such construction is to make further allowance for the creepage of the manifolded webs when drawn around curved surfaces. This creepage and the attendant staggering of the feed perforations becomes magnified as the number of sheets are multiplied, so that when using a thick web of record material, the feeding devices cooperating therewith should be proportioned to engage the feeding perforations and disengage therefrom without tearing any webs. The cooperation of the eccentric elliptical pins is shown diagrammatically in Fig. 10 where it is seen that the successive layers of record material and the staggered perforations therein allow room for a pin of elliptical cross-section, only when such a pin is shaped eccentrically. Here again in Fig. 9 at the position corresponding with the recording position U, the long axis of the elliptical section is arranged vertically to provide longitudinal alignment of the record sheets. Then, as the pins turn, they not only provide lateral alignment correction but due to the eccentricity they also move into a position to be readily disengaged from the thick web wherein the staggered perforations form an oblique cylinder. In all of the views shown, the extent of creepage and the oblique angle of the feed perforations are magnified in order to make the problem more apparent. However, an actual example may be talren and a problem solved with respect to th diagram shown in Fig. 11.

In Fig. 11, the two large circles represent margins of perforations in the lower and upper layers of a thick file of manifolded sheets. The object of the calculations in connection therewith is to find the proper dimensions and the proper extent of eccentricity of the feed pin operating end. Turning to the showing in Fig. 9, some actual figures may be assumed to provide a solution for the problem shown diagrammatically in Fig. 11. The thickness of the pile J of the manifolded webs may be assumed to be .010 inch allowing for a number of sheets of manifold paper and carbons. Then, referring to Fig. 11, the stagger or creepage A, B at a point half the circumference of roller away from the point of alignment U will be .010" 2x3.1416+2=.031416" (AB). If the feed perforations are assumed to be of a diameter .100, then the small axis of the elliptical pin should equal BG-AB or .100-.031416=.068584 or the dimension AG. Then the amount of eccentricity HD may be figured by getting the difference between HG and DG, HG being equal to one half the diameter .100, DG being equal to one half the small elliptical axis or one half of .068584 which is equal to .034292, therefore, the eccentricity HD is equal to .050-.034292 or .015708.

The other dimension to be found is the length of the long axis of the ellipse. This is shown diagrammatically as EF and EF is equal to 2 /(EC) (CD) 1 (EC')=.05X.O5'= .0025

(CD)' .015708 X .015708 .000246741264 .002253258736 2V.002253258736=.09936 the long axis Therefore, the three important dimensions are calculable exactly when certain conditions are assumed. Of course, the actual dimensions found for the axes of the elliptical section are modified to provide clearance and rounded edges whenever desired.

While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a few modifications, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art, without departing from the spiritof the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

What is claimed is:

1. In a device with pins moved into and out of a recording position for feeding sheets having a series of circular feed control perforations with which the pins cooperate, a series of feeding pins of elliptical cross-section, a holder in which said pins are rotatably mounted and arranged radially, means for operating said holder to move said pins into and out of the recording position to feed the sheets, one means for turning said pins. relative to the holder so that a pin at the recording position is turned with the long axis of the elliptical cross-section parallel with the direction of feed and aligning the record sheets longitudinally, and other means for turning said pins further so that pins out of the recording position are turned with the long axis of the elliptical cross-section arranged at right angles to the direction of feed to align the record sheets laterally.

2. A device according to claim 1 in which the pins move bodily with said holder with the long axis normally at right angles to the direction of feed, and in which said one turning means operates the pin going to the recording position through an arc of to place the long axis parallel with the feeding direction at the recording position, and said other turning means operates the pin going away from the recording position through an arc of 90 to again place the long axis at right angles to the direction of feed.

3. In a printing machine for feeding and aligning continuous record sheets having circular marginal feed control perforations and having a point of recording or printing line with respect to which said sheets are to be aligned longitudinally and laterally, the combination of a platen, means for operating the platen to feed the sheets, a series of feeding pins for engaging in said marginal perforations to feed said sheets, said pins having a rotatable portion extending coaxially with a feeding portion, said feeding portion being of an elliptical cross section with a long axis substantially equal to the diameter of said perforations, means for mounting said pins radially on said platen with said feeding portions projecting therefrom, and means for rotating said pins with respect to the platen so that the long axes of said elliptical feeding portions of a plurality of sheet engaging pins are turned at different angles in order to align the sheets longitudinally and laterally at the printing line.

4. A machine according to claim 3 wherein one of said rotating means is situated to correspond with the point at which recording is effected on the platen, to thereby turn the pin at the printing line so that the long axis of its section is placed parallel with the direction of feed, whereby the sheets are aligned longitudinally at the printing line.

5. In a sheet feeding device, a feeding roller, means for operating said roller, a series of feeding pins arranged around said roller, each of said pins comprising a hooked outer portion, a pinion portion, a locking shoulder and an inner pivot portion, a pin holder attached to said feed roller and formed with radial grooves in which the pivot portions of the pins are received, a retainer supporting said pins in assembled relation with said holder but free for rotation therein, a circular cup shaped cover attached to said holder and provided with openings through which said hooked portions project, a fixed operating plate adjacent said holder, projections on said plate in the path of said pinion portions to en- 1 gage saidpinions and rotate them and the connected pins as the roller revolves, said operating plate being formed with a notch to provide clearance for said locking shoulder of said pin while said pin is being turned by the projections, said operating plate having a smooth circular surface cooperating with said locking shoulder at all other times, and another circular cup shaped cover attached to said fixed operating plate and of a diameter equal to the first mentioned cover and cooperating therewith to completely enclose said feeding devices with the exception of the extending hooked portions of said pins.

6. In a device for feeding manifolded record sheets having feed control perforations, a platen roller around which said sheets are fed, means for turning said roller, a series of feeding pins arranged around said platen, said pins having a pivot portion and a feed portion eccentrically located with respect to the pivot portion, the axes of said pivot portions being set radially in said platen in which said pins are rotatably mounted, and means for operating said pins to turn them in succession to locate the eccentric feed portion in an advanced position when entering into, and retracted when coming out of, said feed perforations in the manifolded sheets.

7. A device according to claim 6 in which the feed portions of the pins are shaped as involute curved hooks, the end of each hook being pointed in the direction of the eccentricity.

8. In a device for feeding manifolded record sheets provided with feed control perforations to align said sheets at a printing position, a series of feeding pins having pivot portions and feed portions mounted eccentrically with the respect to said pivot portions, said feed portions being of an elliptical cross-section, holding means in which said pins are spaced circumferentially and having the axes of said pivot portions set radially in said holding means and rotatable therein about said radial axes, means for operating said holding means to move said pins in the path of said sheets and carry said sheets along therewith, means for turning said pins in succession so that an elliptical pin section is placed with the long axis parallel with the direction of feed at a point on the holder corresponding with the printing position, said turning means also operating the pins to place the eccentric feed portion of the pins advanced and retracted to advantage when engaging with or disengaging from said record sheets.

9. A device according to claim 8 in which the feed portions of the pins are shaped as involute curved hooks, the end of each hook being pointed in the direction of the eccentricity.

10. In a device for feeding manifold record sheets provided with feed control perforations, a series of feeding pins having pivot portions and feed portions mounted eccentrically with the respect to said pivoted portions, holding means in which said pins are spaced circumferentially and rotatably mounted with the axes of said pivot portions set radially, means for operating said holding means to move said pins in the path of said sheets and carry said sheets along therewith, means for turning said pins in succession so that the eccentric portion is placed with the center of eccentricity and the center of the pivot portion all aligned with a line corresponding with a normal printing position, said turning means also operating to place the eccentric feeding portion of the pins to advantage in engaging with or disengaging from the perforations in said record sheets.

11. In a device for feeding record sheets provided with feed perforations, a series of feeding pins having pivot portions and curved feed portions for cooperation with said perforated sheets,

a circular pin holder with radial grooves open at one side, said grooves receiving said pivot portions of said pins for rotation therein, a retainer held against the side of said holder and against the open grooves to hold the pins therein, means for turning said holder, and means for rotating said pins in said holder.

12. In a sheet feeding device, a feeding roller, a roller rotating means, a series of feeding pins arranged around said roller, 'each of said pins comprising a hooked outed portion, a pinion portion, a locking shoulder and an inner pivot portion, a pin holder attached to said feed roller and in which the pivot portions of the pins are received for rotation, a cover attached to said holder and provided with openings through which said hooked portions project, a fixed operating plate adjacent said holder, projections on said plate in the path of said pinions to engage said pinions and rotate them and the connected pins, said operating plate being formed with a notch to provide clearance for said locking shoulder of said pin while said pin is being turned by the projections, said operating plate having a smooth circular surface cooperating with said locking shoulder at all other times, and another cover attached to said fixed operating plate and of a diameter equal to the first mentioned cover and cooperating therewith to completely enclose sheets provided with feed control perforationsi'a series of feeding pins each having a pivot portion and a hook shaped feeding portion mounted eccentrically with the regard to said pivot portion, said hook facing in the direction of the eccentricity, said feeding portion being of an elliptical cross-section with the long axis of the ellipse at right angles to the direction of eccentricity, a holder in which said pins are spaced circumferentially and rotatably mounted with the axes of said pivot portions set radially, means for rotating said pins in succession so that the elliptical sections are turned to align the sheets, said rotating means also operating to place the eccentric feeding portions of the pins in an advanced and then a retracted position in engaging with and disengaging from said record sheets, and said rotating means serving further to turn the hook portions facing forward and then backward in eng in with and disengaging from said sheets. a

14. In a device for feeding a continuous web of record material with feed control perforations, a platen around which the record is drawn, a feed roller placed to one side of said platen and between the advancing slack portion and returning printed portion of said record web, a

groove located to coincide series of pins rotatably mounted on said roller. each of said pins having a pivot portion in said roller and an extending hook shaped feeding end, and a series of irregularly spaced pin turning means arranged around said roller and located at the points of tangency and between points of tangency of the web with the roller to turn said pins progressively to advance and retract' the hook shaped ends of said pins a plurality of times in cooperation with the advancing slack portion of the web, and a plurality of times in cooperation with the returning printed portion of the .web.

15. In a device for feeding a record with feed control perforations, a platen past which said record is fed, said platen being formed with a with said perforations, 9. feed roller cooperating with said platen, a series of hook shaped pins rotatably mounted on said roller and located to coincide with said groove, and a plurality of pin turning means 00- operating with the pins successively to face them in alternate perforation engaging and retracting positions, one of said turning means being located to cooperate with the pins at the point of tangency between the platen and the roller, said hooks facing in the direction of feed when entering the record and facing opposite to the direction of feed when retracted from the record.

ROBERT E. PARIS.

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