US2796771A - Strip feeding device - Google Patents

Description

June 25, 1957 G. 0. BROWN 9 STRIP FEEDING DEVICE 7 Filed May 13, 1952 3 Sheets-Sheet l INVENTOR GEO/P65 C BROWN June 25, 1957 e. 0. BROWN STRIP FEEDING DEVICE 3 Shegts-Sheet 2 Filed May 13, 1952 m a Q N n J 1%. mm I 1F. m m 1 mm g om B 3 mm m MMUIXMMWJ 3 a Q T J n 25, 1957 G. 0. BROWN 2,796,771

STRIP FEEDING DEVICE INVENTOR GEORGE C BROWN United States Patent M STRIP FEEDING DEVICE George C. Brown, Dayton, Ohio, assignor to The Standard Register Company, Dayton, Ohio, a corporation of Ohio This invention relates to strip feeding mechanisms of 2,796,771 Patented June 25, 1957 Fig. 6 is a view similar to Fig. 5, but with some parts omitted; and

Fig. 7 is a view in cross section taken substantially along the line 7-7 of Fig. 5.

Like parts are indicated by similar characters of reference throughout the several views.

Referring to the drawings, the invention is disclosed in a strip feeding mechanism, forming part of a bursting device. In such a device, a continuous strip made up of series connected record forms, for example checks, is

' acted upon so as to successively detach the form at the the pin wheel type, and has special reference to such 1 mechanisms as used in conjunction with slitting means for trimming olf the perforate margins of the strip.

The object of the invention is to simplify the construction as well as the means and mode of operation of strip feeding devices whereby such devices may not only be economically manufactured, but will be more efiicient and satisfactory in use, adaptable to a wide variety of applications, having relatively few parts and be unlikely to get out of repair.

A further object of the invention is to make use of disappearing type, cam operated feeding pins.

Another object of the invention is to enable the pin wheel body to serve directly as a bearing surface for the slitting means.

A further object of the invention is to obiviate the need for special stripping devices to remove the trim material from the feeding pins, such function being accomplished automatically by withdrawal of the feeding pins into the pin wheel body.

Still another object of the invention is to enable trimming or slitting in closer proximity to the pins than has heretofore been possible.

A still further object of the invention is to provide for adjustment of the slitting means whereby the strip may be trimmed alternatively on opposite sides of the feeding PlIlS.

Still another object of the invention is to provide a generally new disappearing pin type feeding unit which is adjustable independently of the slitting means.

A further object of the invention is to provide a strip feeding device of the character described, possessing the advantageous structural features, the inherent meritorious characteristics and the mode of operation herein described.

With the above primary and other incidental objects shown the preferred but obviously not necessarily the only form of embodiment of the invention,

Fig. l is a plan view of the feeding mechanism of a bursting machine, with some parts omitted, constructed in accordance with the instant invention;

Fig. 2 is a view of some of the mechanism of Fig. l, in side elevation;

Fig. 3 is a fragmentary view taken substantially along the line 3-3 of Fig. 2, the slitting means being reversed in Fig. 3, relatively to the arrangement of Fig; 1;

Fig. 4 is a view in cross section, taken substantially along the line 4 -4 of Fig. 3, with some parts omitted;

Fig. 5 is a detail view, partly in longitudinal section,

invention.

leading end of the strip. This is done by tensioning the leading end of the strip beyond the strength of transverse weakened lines representing division or separation lines between the forms.

The strip has longitudinal, marginal perforations engaged by pins for positive, continuous feeding of the strip. Supplemental feeding, with tensioning or bursting impulses, is provided through intermittently engaged friction rolls spaced apart and operating at different speeds.

Structurally, a bursting device may include, as shown in Figs. 1 and 2, a frame mounted shaft 11. Pivotally mounted on such shaft are spaced apart plates 12, suitably interconnected for unitary movement. One of the plates 12 carries a roller 13 riding on a cam 14 fast on a shaft 15. In the operation of the machine, the shaft 15 is continously rotated, and the shape of the cam 14 is such that it imparts to the unitary assembly of plates 12 a quick oscillatory movement once for each cycle of rotation of the shaft 15. Journaled between the plates 12 are shafts 16 and 17 on which are mounted respective rollers 18 and 19. Above the plates 12, and supported between the side frames of the burster are other shafts 21 and 22 carrying rollers 23 and 24 which are respectively in adjacent, overlying relation to the rollers 18 and 19. The shaft 16 and the shaft 22 are positively rotated, as from the shaft 15, with the roller or rollers 24 having a greater surface speed than the rollers 18 and 23. The strip, indicated at 25, passes between the opposing sets of rollers 18, 23 and 19, 24, being suitably fed by continuously rotating pin wheel feed devices (to be described) on the shaft 16. Under the influence of cam 14, rollers 18 and 23 and rollers 19 and 24 intermittently are squeezed together and exert a supplemental feeding force on the strip 25. The faster rotating rollers 19 and 24 become tensioningor snatch rollers with respect to the slower rotating rollers 18 and 23 which assume the function of snubbing rollers. Accordingly, and since the strip 25 is arranged to present a weakened division line intermediate the sets of rollers at the same moment the roller 13 is lifted by cam 14, the machine operates to detach and eject the leading record form on the strip upon each turn of the shaft 15. When the roller 13 and associated parts are allowed to descend by the cam 14, the friction rollers are disengaged from one another. The strip, however, continues to be pin fed, advancing over a table 26 to place its leading end between the tensioning rollers 19, 24.

Referring to Fig. l, the pin feeding means in a bursting machine, conventionally includes a pair of pin wheel units 27 (one shown) made fast on the shaft 16 and comprising a circumferential series of fixed pins 28 for engagement with the marginal perforations in the strip. In accord- 'ance with the instant invention, however, the burster includes a modified pin wheel feed unit 29 which may replace one of the units 27 or which may be used in addition to the conventional units. According to the latter conception, the unit 29 may be mounted on the shaft 16 in position to cooperate with one of the units 27 in feeding a narrower strip and. hence avoid the need for repositioning the units 27 along the shaft. It will be understood, of course, that the units 29 may entirely re place the units 27 and that they also have utility in embodiments other than bursting machines.

Considering the illustrated unit 29 in greater detail, and referring to Fig. 5, it includes a relatively long cylindrical body; 31'havirig athrougli longitudinal bore 32 through which shaft 16 extends. A counterbore 33in OheQend: of the body31 receives a bearing sleeve 34. Registering openings in the body and in sleeye34 are proyided fora set screw 35 which'is adjustable to hold the body '31 releasably in longitudinal positions of adjustment on the shaft 16. A projection 36 on screW.'35 enters a keyway 37 in the shaft 16 and precludes. rotary motion of the body '31 relatively to the shaft.

Approximately midway between its ends, the. cylindrical body31 has a circumferential series of: radial holes 3& in which tapered-nose pins 39 are slidably. mounted. At their inner ends the pins. 39 are notched for cooperative engagement with the flange 41 of a cam sleeve 42, such flange having an eccentric shape as. seen in Fig. 7. Asv a resultof. such shape, any motion of. the body 31 which carries. the. pins 39 relatively to the flange 41 causes the pins to be progressively. extended and retracted with respect tothe surface of the body. The cam sleeve 42 isreceived'in a counterbore 43 in the end of body 31 opposite counterbore 33. The flange 41 has a bearing on' the wall of'the counterbore 43, while outwardly of. such flange the cam sleeve is spaced from the body. A locking sleeve 44 is inserted between the cam sleeve 42 and the wall of counterbore 43. It has at its inner end a shoulder 45'bearing on the back of the flange 41, and, at its outer end, a flange 46 limiting against the end of the body 31. Adjacent to the flange 46, the locking sleeve 44. is externally threaded, complementarily to internal threads on the wall of bore 43, thusdefining a connection 47 whereby thesleeve 44 may be screwed intoand out of locking engagement with the cam sleeve 42.

The cam sleeve. 42 is. itself counterbored to receive an extensionmember 48. The latter hasa press .fit in the sleeve 42 and is in effect an integral part thereof, being made separable merely in the interests of simplified manufacture and? assembly. The cam sleeve 42, through itsv extension member 48, extends through and beyond the end of. the body 31. In theprojecting end thereof .is. a circumferential series of holes '49 which. at their outer ends terminate inshallow depressions 51. Further, there isfmounted on' such projecting end'a. plate member 52 carrying a series of. spring pressed plungers 53. These engage the surface of. the sleeve extension 48 and are alignedlwith the depressions 51. Thus, whenthe. relative rotary positions of the cam sleeveiand theplatemernber. 52 aresuch as to allow the .plungers 53 to settle into registering'jdepres'sions 51, relative, rotary motion between the parts is inhibited. The platemember52 is; anchored, as. showninfig- 4, to tierods 54 supported betweenthe plates.12. Normally, therefore, they cani.sleeve.42 and flarige41. thereon are held against rotary motionso that rotation of. the. shaft 16 and body 31 are accomplished independently of the cam sleeve andflangef The plate member 52 has'an access opening 55 therein through which an operator may insert an instrument and engage one of the holes 49 to turn the cam sleeve 42 relatively to the member 52 against the. resistance. of plungers 53. By means of such adjustment, the flange 41 on sleeve 42 is caused to assume a new rotative position of adjustment andso to vary the circumferential area of projection of the feeding pins 39. The sleeve may assume a number of different positions of'adjustmen t, corresponding to the number and spacing of the holes 49. Further, since the feeding pins 39 can be controlled thereby in a manner rendering them inefliective to engage the strip, it is possible to. mount a number of the pin wheel devices 29 on the same shaft, thus providing a means for feeding marginally punched forms of varying.

widths without the necessity of making axial adjustment of the devices along the shaft.

Near the opening 55, the surface of the plate member is formed with a recess 56 to avoidcontact ofthe plate member with the roller 23. On the outer end of the cam sleeve extension 48 a collar 57 is installed to hold the member 52 in assembled position.

As indicated in Fig. 2, the record strip 25 passes under an idler roll 58 and thenbeneath a hold down member 59 which is in overlying relation to the unit 27 or to the body 31 of unit 29, and. includes bifurcations or spaced apart fingers 61 and 62. Such fingers. serve to. hold the strip in engagement with the pins 28 or 39. The member 59 is attached through a bracket 63 to. a carrier 64 on the shaft 11. The assembly comprising the member 59, bracket 63 and carrier 64 is adjustable along the shaft 11, being secured in a selected position by a set screw 65 Another screw 66 connects the bracket 63 to the carrier 64 and provides a means for removing one member 59 and replacing it with another. It isfdesirable,'in bursting machines, to slit or trim themargins of the strip, along the rows of perforations therein. Associated with each. pinwheel unit is a trimming unit. including an. arm 67 adjustably secured to the shaft- 11. The. 'arm extends. into. overlying relation to the pin wheel; unit and carries. a trimmer or.- slitting disc 68 of frusto-conical shape. Thedisc 68 is arranged. in sidebyside relation with the feeding pins, and, in the case of the unit 29, bearsdirectly upon the body 31 which may be appropriately hardenedv to sustain the cutting. action of the disc. The disc is, moreover, received.be.-. tweenthe bifurcations 61 and 62, along with the feeding pins, and may cut along av linecontiguousor tangential to the. side edges. of.- the perforations in the strip.

As may be seen from a comparison of Figs. 1 and 3, the trimming or slitting unit may be assembledcto cut on. either side of the feeding pins. Thus, the disc 68: is

fastened tothearm 67 through meanscomprising ascrew 69 and a spaceriing 71. Assembled as in Fig. l, the ring. 71 is interposed between the disc and the arm 67', while the disc is placed so that its base, which ist he cutting. edge, faces. and is.closely adjacent-tothe feeding: pins. Reassembling, the parts to cut along theline indicated in Fig. 3, the arm 67 is shifted to a ne'w position on shaft- 11, the spacer ring 71 ismoi ed to the opposite side of the disc 68, and the disc-itselfisreversed.

0n the hold down member 59, the finger 61 is relatively shorter than the finger 62 and has an upturned lip. allowing the mainpart of thestrip to move substantially straight out and onto the table 26; The finger 62 is; relatively long and urlsover. the pin wheel body in a manner to direct the severed margin 25- of the strip downwardlyandout-of-the machine. In the case of thefixed pin unit'27, a stripper; member 721 may be provided to free the severed margii from the pins 28 In the case offthe unit- 29, any such strippingrnans is unnecessary, es as er; 2" r it a awaiat t e ad 3 5mg: e. lf r siag'fl th ealest te h hip nd hei it etgin thereof. Themem-bers 59 are readily demountable.

from the .carriersfi l, and aresuppliedin reverse shapes:

so that they may be selectively installed' pcording. to whether they are to engagetheleft handorrighthand side edgeof the strip. 4'

From the abovexdescription it;will be apparenhthat there is thus,pro,vid ed a, device ofthe. character described possessing the, particular,featureszof advantage before enumerated as desirable, butwhich obviously is 'suscepti-l ble of modification. in its form, proportions, detailcdnstruction and arrangement of parts without departing from the principle in'volvedf-or sacrificing any of itsadvantages. i j

a at essf ed. i ii msam r es neci iq s.

s vt e r eatl r f ste be.under too that hei vention is not limited specific features shown, but that the means and construction herein disclosgd cqui-g 5 prise but one of several modes of putting the invention into effect.

Having thus described my invention, I claim:

1. A unitary pin type strip feeding device, including a cylindrical body having a circumferential series of radial holes, pins reciprocably mounted in said holes, a cam received within said body and operatively engaged with said pins, a locking sleeve received in said body through one end thereof and holding said cam from withdrawal from said body, said sleeve being removably secured in said body, said cam having a cylindrical portion rotatably mounted in said locking sleeve and projecting at its outer end through and beyond said locking sleeve and said body, said projecting outer end being formed with a circumferential series of detent positions, a plate rotatably mounted on said outer end of the cylindrical portion of said cam, and detent pins carried by said plate spring urged to engage in said detent positions, said plate being adapted for anchoring whereby yieldingly to hold said cam in a set position of rotary adjustment relatively to said body.

2. A unitary pin type strip feeding device according to claim 1, characterized by a recess in said plate rendering said detent positions accessible for manual rotary adjustment of said cam relatively to said plate.

References Cited in the file of this patent UNITED STATES PATENTS 1,289,238 Onderdonk Dec. 31, 1918 1,531,325 White Mar. 31, 1925 2,012,289 Sherman Aug. 27, 1935 2,047,233 Sherman July 14, 1936 2,164,375 Berndt July 4, 1939 2,252,733 Sherman et a1 Aug. 19, 1941 2,252,734 Sherman Aug. 19, 1941 2,252,736 Sherman et a1. Aug. 19, 1941 2,328,582 Ratchford et a1 Sept. 7, 1943 2,399,154 Antrim et a1. Apr. 23, 1946 2,399,906 Bentley May 7, 1946 2,476,326 Sherman July 19, 1949 2,573,332 Herman Oct. 30, 1951 2,599,648 Lanegan June 10, 1952 2,600,041 Wright June 10, 1952

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