US1304760A - frohn - Google Patents

Description

L. J. FROHN. I BACKING MAC'HINE FOR BOOKS, TABLETS, AND THE LIKE.

APPLICATION FILED APR.10, 1916.

1,304,760. Patented May 27, 1919;

2 SHEETS-SHEET l. I

- In ventor:

. Q by% i st:

, L.J.FROHN. BACKING MACHINE FOR BOOKS, TABLETS, AND THE LIKE.

APPLICATION FILED APR I0, I9I6.

' 1,304,760. Patented May 27,1919. 2 $HEETSS HEET 2 u n 12 25 El] 34 23 L f 50 24 28 I wing 42 5' 41 Inventor:

'spondence or adjustment in position of the able, satisfactory and otherwise improved application to a machine such as that shown UNITED STATES PATENTOFFICE.

TIJEONARD J. rRoHN, or NEW YORK, 1v. Y.

BACKING-MACHINE FOR BOOKS, TABLETS, AND THE LIKE.

To all whom it may concern:

Be it known that I, LEONARD J. FROHNg, a

subject of the Emperor of Germany, and a resident of the city of New York, borough of Manhattan, county and Statev of New 'York, have invented certain new and useful Improvements in Backing-Machines for Book's, Tablets, and the like, of'which the following is a specification.

This invention relates to machines for applying adhesive tape to theedges of assembled sheets in process of forming the same- -into. a book, pad, tabletor thev like, wlth more particular reference to mechanism 1n such machines for insuring :exact -corre edges of thesuperposed sheets to be taped,

- and to mechanism for insuring-more nearly .perfect'uniformity' 1n the taping operation,

having in view'a more uniformly dependproduct.

The present. invention, while capable of adaptation to many known. types of taping machines, is more particularly designed for and described in patent toJoseph Hren, No. 1,252,114, dated J anuaryl, 1918, wherein the piles of assembled sheets to be taped are successively fed into the machine, a continuous tape with a suitable adhesive thereon being applied'to the edges of each advancing pile of sheets, and a cut-ofi mechanism being provided to automatically sever the tapestrip between the taped books or pads prior to final discharge or ejectment of the finished or partially finished work.

Where these piles of assembled sheets are consecutively fed into the machine by hand, it will be apparent that in spite of the employment of suitable guidingmeans and the exercise of thegreatest care, the edge of each pile to be taped will not be invariablyadvanced through theltaping mechanism with said edge parallel to the direction of advanc ing movement. As it is important, if not essential, that the edges of the superposed sheets be inpractically perfect register and the edge of each sheet contact with the adhesive tape, which is folded over-and *ressed against the-tsp and bettem sheets at repile,

' Specification of Letters Patent. Patented May 27,.19 19. Application filed April 10, 1916. Serial lll' o. 90,035. A

it will be apparent that in bringing together said sheet-edges and tape in the tape-applying operation, some means should be pro- -vided to automatically insure continuous 2 contact between the tape and the edge of the 5 plle of sheets, irrespective of slightly imthe operative.

proper positioning of eachpile of sheets by Furthermore, in-foldin g' over the top portion 'of the tape and applyingthe same to the top sheet of the pile, it has been found that best results are obtained through the employment of a rotary brush, such as that shown and described in the Hrenpatent,

- aforesaid, butit will be noted that while the bristles on one side of said brush move in a; .1 direction which causes them to tend to stretch the tape, "smooth out the same on the top of the pile, and-yieldingly press it downupon the top sheet, the bristles on the other sideof said brushhavea reverse or undoingtend- -ei1cy, on which account thebrush is tilted or inclined for thepnrpose of elevating the ends of the'bristles on one sidethereof sufhcient to clearthefpressed tape, leaving effectively operative only the bristles on the side of saidbrush which are moved toward the edgeof the tape. It has been-found, however, that desired effect on the. other side thereof is minimized. I have, therefore, found it desirableif not essential to best results to provide auxiliaryor supplemental means for insurin the clearance to which I have re ferred above. Furthermore, tape-pressing means other than the brush have been found desirable, in

. order to produce not only a product which is compact, buta product to which the tape. has been evenly and firmly applied.

The principal object of the present invention is the provision of means, in connection with a taping machine of the character to i which I have referred, forperformingthe' I desirable functions set forth above, and to provide a machine which embodies other minor improvements tothe end of insuring a uniformly high grade product. p L v y. i ventiee'will be r adily finder stood by reference to the accompanying drawings, forming a part of this specification, in Which Figure 1 is a side elevation of the top portion of a taping machine embodying my invention;

Fig. 2 is an enlarged fragmentary top plan view thereof;

Figs. 3 and a are enlarged fragmentary sections taken substantially on the lines 33 and l l, respectively, of Fig. 2, and

Fig. 5 is an enlarged fragmentary section taken substantially on the line 5-5 of.

continuously unrolled from a reel thereof,"

or for moistening a dry adhesive which has already been applied to one side of said tape. This gumming or moistening mechanism is not shown in the drawings, as it forms no part of the present invention, but a practical and convenient form thereof is shown and described in detail in the patent to Hren, aforesaid. For the purpose of this description, it will sufiice to state that from the gumming or moistening device, the tape 9 is directed upwardly over the driven roller 10 which advances said tape and delivers the same to and upon the curved guideplate 11 suitably secured at the edge of the table top. This guide plate 11 is gradually transversely curved or :bent upwardly to form a substantially vertical port-ion 12 at the far end thereof, and the tape 9 is directed over the roller 10 in such manner that a substantial portion of one edge thereof travels along the horizontal portion of the end of the plate 11, while the major portion thereof is upwardly directed by the vertical portion 12 of said plate, giving the advancing tape a substantially L-shaped cross-sectional configuration, with the upper edge thereof projecting above the topof the pile of sheets to be taped.

The edge of the table top 7 is provided with a vertical guide plate 13, against which the dge of each pile of superposed sheets to be rec'ted' mto the feeding'mec'hanism, in such taped is adjusted by hand prior to feeding said pile, in the direction of the arrow, between the presser belt 14, mounted upon the outer face of the endless chain 15, and a lower belt 14 carried on the outer face of the endless chain 15'. The chain 15 passes over the sprocket wheels 16 and 17 the latter being provided with a bevel-gear 18 in mesh with a bevel-gear 1'9 on the driving shaft 20, and the chain 15 passes over the sprocket wheels 16 and 17', the latter carrying a bevel-gear 18 in mesh with a similar gear 19 on said driving shaft 20.

advancing tape, against which the pile is pressed and the pile compressed to more compact form by the flat leaf-spring 21 suit ably located for this purpose. That portion of the tape which has been longitudinally folded at substantially right angles to" said horizontally disposed portion, is now in position for folding the top edge thereof over the top'sheet of the pipe. It may :be, L

however, that the pile of'blanks to be taped is for some reason'improperly directed into the taping mechanism, and if this is the case the registering edges of the sheets of the pile will not be brought into contact with the vertical portion of the adhesive tape throughout the'whole extent of said edges,

and the taped book or pad will therefore be imperfect and unsatisfactory. To efl'ect substantially continuous con-tact, in spite of careless or faulty manual feedmg, and to insure better registration of continuous edges of the sheets of the pile, I mount upon the table top 7 a. bracket 22 carrying the pin or post 23', upon which is adjustably mounted the split collar 24.- to which is secured the resilient arm 25 spring-pressed in the direction of the table top. This spring arm 25 is preferably of leaf-spring form,

and the upper-edge of the free end thereof is in-tu'rned, or the arm otherwise provided with a flange 26, tapering downwardly toward the top of the pile of advancing sheets, whereby the upwardly projecting portion of the advancing tape 9 is folded over the top of the pile 27 of the sheets to be taped, as best shown in Fig. 4:. A notch or recess 28 is provided in the edge of the plate 11, permitting inward movement of the end of the spring arm 25 beyond the plane of the vertical portion 12 of the guide-way.

Should a pile of sheets be improperly dimanner that the edge thereof to be taped does not abut against the vertical portion 12 of the plate 11, or be slightly inclined horizontally from the planeof said vertical portion 12, the end edge of the arm 25,

which is being yieldingly pressed against the flexible tape toward the edge of the pile of'sheets being taped, will press the vertical portion of said tape against the side edge of the pile. In this manner, I insure substantially uniform contact between the end edges of the sheets 'being taped and the vertical portion of the taping strip, the recess 28 permitting of the assembled sheetsbeing followed by the spring-pressed arnr2'5 to '25, the now partially taped books or pads pass under the rotary brush 29, which is tilted or inclined, as shown, in order that the bristles 30 on the near side thereof will wipe or rub over the folded portion of the tape toward the edge thereof, while the bristles on the-far side of said brush are raised clear of the tape in order that movement thereof may not undo, or partially undo, the work which has been done by the effectively operating bristles on the'near side of the brush. The brush 29 is rotated from the shaft 33 which is flexibly connected with the inclined brush shaft in a common and well-known 'manner, the shaft'33 being rotated from the driving shaft 20 bymeans of a belt 31 passing around a'pull'ey 32' on thelatter and a pulley" 32', on Y the" former, all as shown and 25 described in the patent to I-Iren, aforesaid. Furthermore, to insure against the poss1- bility of reverse or undoing effect of the brush bristles on the far side of said brush, in addition to tilting or inclining the latter Iprovide the flat leaf-spring 34, so curved or in turned that the free end thereof ispresented to the advancing pile of taped sheets, lying flat againstthe upper taped edge thereof. The end 35 of this spring 34f is sharply incurved upon itself, as best shown in Fig.3, to provide a rounded edge, so that it may not engage 'andobstruct or impede movement of the advancing work or partially detach the tape from the pad or'pile'before the adhesive has set. I 1 7 V This spring plate'34 is so located that the edge 35 is beneath the brush 29,111- such position with relation theretothat'at the point where the revolving bristles 30 start upon their return movement toward the edge of the pad, they are lifted from the latter and *carried along the base of said plate out of contact with the tape, and are therefore incapable of applying forces which might otherwise tend to loosen ordisplace said tape. l

I have found," however, that the brush 29 alone, while performing a most useful function, is not absolutely dependable; asa means for insuringsubstantially continuous adhesion between the tape and the 'work;' To

com lete or perfect the (taping operation, therefore, I prefer to pass-the taped edge of the work over an idler roller 36 and under ,presser roller .36, the latterebeing locatedat the end of the arm 37 pivoted on the pin 33, and being under yielding pressure'from the spring 41 in compression between said arm '37 and the head 42 atthe end of the ad jutting screw 43,

I115 roller '86 insures complete and continuous adhesion of the tape to both sides of the edges of the books or pads which are being carried by the belts 14 and 14 to suitable mechanism for severing the tape-strip between adjacent pads'or books, and thus delivering the latter in a separated condition-this cut-off mechanism not being shown inthe drawing as it forms no part of the present invention. 7

By means ofthe several improvement hereinbefore described, I find that I can produce' a high-grade product of uniformly superior qualities. 7 -Ma'ny modifications of minor details'of my improved tape-applying mechanism for book-backing machines will doubtless read-v 1ly suggest themselves to those skilled in the art to which it appertains, andI therefore i do not desire to limit my invention to'the specific construction herein shown and described;

I claimas new and de'sire'to secure by Letters Patent:

1. In a machine for backing books, tablets or the like, the'combination, with means for advancing substantially rectangular work units in continuous procession throughthe machine, of means for folding around corresponding side edges of the advancing units successively a continuousadhesive strip of flexible material, said folding means includ ing means for yieldingly pressing the advancing strip toward and against the contiguous edge of each unit in transit.

2. In a machine for backing books, tablets and the like, the combination, with means for advancing substantially rectangular work units in continuous procession through the machine, of means for folding around "corresponding side edges of the advancing units successively a continuous adhesive strip of flexible material, said folding means comprising separate devices one of which also provides means for yieldingly pressing the 'advancing strip toward and against the contiguous edge of each unit in transit.

] 3. In a'machine for backing books, tablets and thelike," the rombination, with" means for advancingindividual piles of assembled sheets successively into andth'rough the ma chine,*of yielding means for compacting the edge ,to be taped of eachlpile, means for folding around said'compacted edges successively a continuous adhesive strip of flexible material, a portion of said folding'm'eans incl-uding means for yieldingly pressing said "strip toward and against the edge of each pile prior .to completion of the folding op eration, and means for yieldingly pressing the'tape edges against the sides of each' 'p l'e to lnsure continuous and uniform adhesive contact betweensaid tape and the portions atlas '11 ii 4? of the pile to which it is applied. 4. In a machine for'backmg backs,

and the like, the cc-inhalation, with mes-1s for advancing individual piles of assembled sheets successively into and through the machine, and means for correspondingly advancing a continuous adhesivestrip of flexible material, of means for directing said strip to successive contact with correspondoperation, said last-mentioned means being also yieldingly operable to press the middle portion of the tape in toward and against the edge of each pile in transit.

*5. In a machine for backing books, tablets and the like, the combination, with means for advancing individual piles of assembled sheets successively into and through vthe machine, and means for correspondingly advancing a continuous adhesive strip of flexible material, of means for directing said strip to successive contact with corresponding side edges of the advancing piles, said directing means also-operating to apply one edge of said; strip to one side ofthe contiguous edge of each pile and rectangularly foldthe remainder of said strip longitudinally for subsequent application of the other edge thereof to theother side of the edge of said pile, and means for completing the folding operation, said last-mentioned means comprising a guide-arm which is also springactuated toward said pile and which is provided with a vertical edge at the end there of adapted to be yieldingly carried beyond the normal path of movement of the contiguous edge of said pile.

6. In a machine for backing books, tablets and the like, the combination, with means for advancing individual piles of assembled sheets-successively into and through the machine, yielding means for compacting each pile at or near the edge thereof tobe taped, and means for advancing a continuous strip of adhesive tape, of means for directing said tape to the compacted side edge of each pile in transit, said directing means also operating to apply one edge of said tape to one side of the contiguous edge of each pile and rectangularly fold the remainder of said tape longitudinally for subsequent application of the other edge thereof to the other side of the edge of said pile, means for completing the folding operation, said last-mentioned means being also Qoperable to yieldingly press the middle portion of the tape toward and against the contiguous edge of each pile in transit, and means for yieldingly pressing the tape edges against the sides of each pile to, insure continuous and uniform adhesive contact between tape and the portionsof the pile to which it is applied.

7. In a machine for backing books, tablets and the-like, the combination, with means for advancing substantially rectangular work umts successivelyinto and through the machine, and means-for longitudinally applying adhesive tape around one side edge of each unit in transit, of a member rotatable about a substantially vertically disposed axis .and presenting a yielding face to the tape portion on one side of each pile in turn to exert rubbing pressure thereagainst, and

means interposed between the tape and that shifting portion of said member, the general directionof rotation of which is from the .edgetoward the fold of the rubbed portion of said tape to intercept all rubbing forces which would otherwise be exerted in said generaldirection.

' 8. In a mach-'ne for backing books, tablets and the like, the combination, with means for advancing individual piles of assembled sheets su'cessively into and through the machine, and means for longitudinally applyingan adhesive tape around one side edge of each of said piles in transit, said means being adapted to first apply said tape to one side of the pile at its edge and subsequently fold said tape around said edge and upon the other side of said pile, of a member rotatable about a substantially vertically disposed axis and presenting a yielding face to the tape portion last applied ,to the pile to exert rubbing pressure thereagainst, and means interposed between the tape and that shifting portion of said member, the general direction of rotation of which is from the edge toward the fold of the rubbed portion of said tape to intercept all rubbing forces which would otherwise be exerted in said general direction.

9. In a machine for j'back-ing books, tablets and the like, the combination, with means for advancing individual piles of assembled sheets successively into and through the ma chine, and means for longitudinally applyingadhesive tape around one side edge of each pile i'n transit, of a member rotatable about a substantially vertically disposed axis and presenting a yielding face to the tape portion on one side of the pile to exert rubbing pressure thereagainst, said member being slightly tilted to raise the shifting side thereof which. is moving over the pile toward the edge thereof,and means interposed between the raised side of said member and said tape to positively intercept and receive 12511 rubbing forces on this side of said memer. a

10. In a machine for backing books, tablets and the like, the combination, with means for advancing individualpiles of assembled sheets successively into and throu h the, machine, means for longitudinaily lac applying an adhesive tape around one side edge of each of said piles in transit, said means being adapted to first apply said tape to one side of the pile-edge and subsequently fold said tape around said edge and upon the other side of said pile, of a member rotatable about a substantially vertically disposed axis and presenting a yielding face to the tape portion last applied to the pile to, exert rubbing pressure thereagainst, said member being slightly tilted to raise the shifting side thereof which is moving over the pile toward the edge thereof, and means interposed between the raised side of said member and said tape to Ipositively intercept and receive all rubbing orces on this side of said member.

11. In a machine for backing books, tablets and the like, the combination, With means for advancing individual piles of assembled sheets successively into and through the machine, and means for longitudinally applying a strip of adhesive tape around one side edge of each pile in transit, of a brush rotatable about a substantially vertically disposed axis and having bristles on the side thereof presented to the tape portion on one side of the pile being taped and adapted to wipe said portion, and means interposed between said tape and that shifting portion of said brush the general direction of rotation of which is from the edge toward the fold of the rubbed portion of said tape to raise clear of the latter the bristles not moving in such general direction. 7 12. In a machine for backing books, tablets and the like, the combination, with means for advancing individual piles of assembled sheets successively into and through the machine, and means for longitudinally applying a strip of adhesive tape around one side edge of each of said piles in transit, said means being adapted to first apply said tape to one side of the pile-edge and subsequently fold said tape around said edge and upon the other side of said pile, of a brush rotatable about a substantially vertically disposed axis and having bristles on the side thereof pr sented to the tape portion last applied to the pile being taped and adapted to wipe said portion, and means interposed between said tape and that shifting portion of said brush the general direction of rotation of which is from the edge toward the fold of the rubbed portion of said tape to raise clear of the latter the bristles not moving in such general direction. I

In testimony of the foregoing, I have hereunto set my hand in the presence of two witnesses.

LEONARD J. FROHN. Witnesses:

H. R. CONWAY,

GoLDIE L. ECKSTEIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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