US2141634A - Adhesive applying mechanism - Google Patents

Description

Dec. 27, 1938. H. F. AFI-ELDER ADHESIVE :APPLYING MECHANISM original Filed Nov. 12,' 1954 2 sheets-sheet 1 ATTQRNEYS Dec. 27, 1938. H. F. AFI-ELDER 2,141,634

ADHESIVE APPLYING MECHANISM Original Filed Nov. 12, 1934 2 Sheets-Sheet 2 INVNroR. HARRY F Aff-'ELDER ATTORNEY:

Patented Dee. 21, 193s IUNITED sTATEs` PATENT OFFICE ADHESIVE APPLYING MECHANISM Harry F. Aifelder, Cleveland Heights, Ohio 'z claims. (ol. sii-50) This invention relates to adhesive applying mechanism and is a division of my prior application Serial No. 752,666, filed November 12, 1934, which has matured into Patent 2,083,539, issued on June 15, 1937.

The objectof the invention is to provide an improved adhesive applying mechanism which is adaptable for use on machines for making various kinds of articles from paper or other ilexible material, and is particularlyuseful in machines such as constitutes the subject matter of my prior application, above referred Vto wherein the a-dhesive applying mechanism is on a revolving head and receives adhesive from a sta- A 1dtionary container or so called gum box.

The invention may be briefly summarized as consisting in certain novel' details of construction, and combination and arrangement of parts which will be described in the specification and set forth in the appended claims. f

In the accompanying drawings I have shown my invention applying to a machine which, as more fully described in my prior application, above referred to, is utilized for making bottle 5 collars and like articles yfrom strips of flexible e material, such as paper, which are adapted to -be rolled up onto a former and to have their overlapping ends united by the applicationof adhesive and byA punching tabs in the overlapping ends. y l

In the drawings,

Fig. 1 is a side elevation of the upper part of the machine, or of so much thereof as is pertinent to the present invention; 2

Fig. 2 is a horizontal sectional view substantially along the line 2-2 of Fig. 1, omitting some parts unessential to the invention;

Fig. 3 is an enlarged fragmentary view showing the adhesive applying mechanism detached from associated partys;

Fig. 4A is a sectional view substantially along' the line 4-4 of Fig. l, showing particularly the gum box for supplying the adhesive which is applied to one end of each strip before it is formed into the article in question; and

Fig. 5 is a, sectional view taken substantially along the line 5-5 of Fig. 3, showing another detail of the adhesive applying mechanism.

Referring now to the drawings, the machine has a horizontal frame or table 20' which is supported from the floor by legs not shown. At one side of the bed is an upstanding standard 22 supporting a motor 23 which, through reduction gearing 24, drives a vVertical centrally disposed shaft 25 supported in bearings located in the boss 26 of an arm 26a extending inwardly from the standard 22. The shaft has at the top a` bevel gear 24a which forms a part of the reduction gearing 24 and will be referred to later.

Secured to. the lower end of the shaft 25 so 5 as to rotate therewith is an arm 21 on the lower free end of which is a block 28 supporting a diagonally disposed shaft on which is journaled a frusto-conical former 30 which extends -in' Wardly. with respect to the frame or table 20 10 with its axis inclined downwardly andintersecting the vertical axis of the machine. At the larger end of the former 30 is a bevel pinion. 3| which engages a bevel ring gear 32 supported in fixed position on the frame 20. Consequently, 15 as the shaft 25 and the arm 21 are rotated, the bevel pinion 3| is caused to roll around the ring gear 32, with the result that the former 30 revolves about the vertical axis of the machine and rotates on its own axis. i 20 On each revolution of the former, there is adapted to be wrapped around its conical surface a strip of paper or the like from which one of the articles is to be produced, with the ends of the strip overlapping. While the former here 25 shown is of frusto-conical shape, theparticular shape will depend upon the shape of the article to be produced. That .is to say, the former will have a frusto-conical shape when the article produced is frusto-conical. On the otherhand, 30 if the articles to be produced on the machine are conical, cylindrical, or otherwise shaped, of course the former will be similarly shaped.

During each cycle of the4 revolving ,and rotating movements of the former 30, ,the latter 35 picks up and causes to be wrapped around its frusto-conical surface, as stated above, one of the strips, designated 34 in Fig. 2. For this purpose I arrange beneath and-just inside the ring gear 32 an elevator on which is adapted to be placed a stack of the strips 34 (see Fig. 2), the arrangement being such that the former rolls over and picks up the uppermost strip of the stack during each cycle.

The mechanism by which the elevator is caused 5 to automatically move upwardly, to keep the up- -permost strip of the stack at the right height relative to the former 30, forms no part "of the present invention and is neither shown nor described, but for a complete understanding of 50 mechanism which may be employed for this purpose reference may be had to my prior application lreferred to.

Suction means is preferably utilized to cause the strip to be firmly held to and wrapped around 55 the former 30 and as the suction means forms no part of the present invention some of the details of the same are not herein illustrated, but are shown in Ymy prior application. It will be suicient to here state that I provide for this purpose a suction tube 45, one end of which is attached to the block 28 forming a part of the rotating arm 21, this end of the tube being adapted to be connected by suitable passageways to air ports which extend from the periphery or outer surface of the former 30 inwardly to a passageway suitably connected with the said end of the tube-45. The other end of the tube 45 is connected to an opening extending axially through the central vertical shaft 25 and in the upper end of the opening, through the shaft 25, is seated a fitting to which is connected a suction tube 41 leading to a vacuum pump, not shown. A vacuum gauge 48 at the top of the fitting is preferably provided, and an adjusting `screw 49 is screwed into a passageway leading to the central passageway of the fitting, so that the degree of vacuum exerted in the suction line maybe varied as desired. The fitting has a close fit in the top of the shaft 25 but does not rotate with the shaft as the stiffness of the tube 41 is sufficient to hold it against rotation.

Thus, as`the rotating and revolving former 30 rolls over the uppermost strip of the stack, the suction exerted on the uppermost strip which the roll engages causes the strip to be wrapped closely about the former and the suction continues to be exerted on the strip until its ends are securely fastened together in a manner to be explained, and after the ends are fastened together the suction is relieved so that the completed article may be stripped from the former. A means for accomplishing this is fully disclosed in my prior application.

Before the former 30 rolls up onto the surface of the uppermost strip 34 of the stack which is supported on the platform, a small quantity of adhesive is deposited on the end of the strip remote from that which the rotating and revolving former first engages, so that when the strip is completely rolled on the former the overlapping ends will be held together by the adhesive. 'I'o apply the adhesive to the end portion of the strip before it is picked up, the following mechanism is utilized:

Mounted in stationary position above the rotating arm 21.0n a frame 56 secured to the'inwardly ,projecting arm 26a of the standard 22 is a gumbox 51 (Figs. ,1 and 11) in the sides of which is journaled a small shaft carrying a gum roller 58, the surface-of which is adapted to contact with the gum in the box, as will be apparent from Fig. 4. On one end of the shaftV carrying the gum roller 58 is a star wheel 59. During each revolution of the arm 21, adhesive istransferred from the periphery of the roller 58 onto the surface of a rotating and revolving roller 6D (Figs. 1 and 5) preferably on a yieldable part of the periphery .of the roller 60, and in this instance on the arc-shaped surface of a yieldable dog 6|-pivotedin a slot in the roller 60, the free end being pressed out by a spring surrounding, an adjustable retaining screw 62, as clearly indicated in Fig. l5.'- By having the adhesive -transferred from the surface of the o roller 58 onto ayieldable member at the periphery of the roller 66, the necessity for fine adjustment is done away with.

'I'his roller 66 is xed to a short horizontal shaft 63 which projects from the inner end 0f and is-in line with the rotating arm 21. This shaft 63 has its inner end journaled in the adjacent end of arm 21 and its outerend is supported and journaled in a bracket 64 which in vturn is supported by a frame 65 secured to and projecting from the arm 21, as clearly shown in Fig.l1. Also 'fixed to rotate with the shaft 63 is a spur gear 66 and a bevel gear 61, the latter engaging a stationary bevel gear 68 fixed to the lower inner part of the arm 26a concentric with respect to the shaft 25. By reason of this arrangement, the roller 60 revolves around the axis of the main vertical shaft 25 and it rotates with its supporting shaft 63, and each time that it passes the lower surface of the roller 58, a film of adhesive is applied to theV arc-shaped surface of the dog 6|.

From thesurface of the dog 6I the adhesive is transferred to yieldable fingers 69 (see Figs. 1 and 5) at the free end of a rotating and revolving arm 16 which is xed to a short horizontal shaft 1| journaled in the lowerend of the revolving bracket 64 which, as previously stated, is supported by the frame 65 secured to the revolving armI 21. Also fixed to` this short shaft 1| is a pinion 12 which engages the spur gear 66 on the upper horizontal shaft 63. By reason of this arrangement, the applying fingers 69 are carried around with the revolving arm 21 and they rotate about the axis of shaft 1|. As they are passing through the upper arc of the circle in which they rotate, they pick up adhesive from the surface of the dog 6|, and when they are rotating through the lower part of the circle they touch and transfer the adhesive onto the end portion of the uppermost strip 34.

Inthis instance,'the pinion 12, because of lack of space, is made one-half the size of the gear 66, in which event the fingers 69 rotate twice while the upper roller carrying the dog 6| makes one rotation, but that is immaterial since it simply means that the adhesive applying fingers 69 rotate twice about the axis of the shaft 1l while they revolve once about the vertical axis of the machine, and therefore/make one idle stroke and then an adhesive applying, stroke, etc. That is to say, at each alternate rotation the fingers apply adhesive to the uppermost strip 34.

The roller 58 which projects into the gum box 51 is preferably turned at each revolution of the revolving arm 21 so that there will always be plenty of adhesive on the lower part of the periphery ofthe roller-,fjind'for this purpose I provide at-the top and outer portion of the bracket 64 a roller 13 (see Fig. l) which on each revolution of the arm 21 strikes one of the teeth of the star wheel 59 and rotates it and the gum roller 58 a predetermined amount. To limit the rotative movement -given to the star wheel and therefore to the gum roller 58, a stop pin 14' is arranged so that its lower end projects into the path of the upper tooth of the star wheel. 'I'his pin, which is spring-pressed downwardly, is movably supported in a strap 15 secured to a frame 16 projecting laterally from the upper part of the boss 26 supporting the main vertical shaft 25 (see Fig. 1). At the top of the pin 14 is a roller 11 which rides on the upper surface of the large bevel gear 24a which is secured to the top of the vertical shaft 25 and on the top of this bevel gear 24a \is a cam or boss 18which at each revolution of the gear24a momentarily lifts the roller 11 and therefore the pin 14 just before the roller 13 engages the lowermost tooth of the star wheel so as to allow the star wheel to be turned through an arc equivalent to the distance between two adjoining teeth and not more than that distance,- the lower end of the pin 14 being released and moving down into the path of the tooth next to the one 'which it had previously engaged so as to limit the movement of the star wheel and therefore of the gum roller 58 to the amount desired.

I do not regard it essential that the adhesive be applied precisely as here shown, that is, to the end of the strip remote from the one which is first rolled onto the former, for it may be applied onto the other end of the strip when the strip is partly rolled onto the former.

Furthermore, I do not regard it essential that' the ygum roller be turned by the specic mechanism herein illustrated, i. e. through the medium of the star Wheel 59 and of the roller or equivalent means 'which revolves with the head. Obviously, a pawl and ratchet mechanism operated Afrom a cam or other means on the rotating bevel gear 2da could be employed.

In some instances, as, for example, with a machine such as utilized for forming bottle collars, it is desirable, in order that the machine have a high production rate, that the holding action of the adhesive between the overlapping ends of the article be supplemented-by tabs punched in the overlapping ends, which tabs serve the important purpose, of holding the ends together until the adhesive has dried. For this purpose there is provided a flat punch plate 19 in fixed position just inside the ring gear 32 at a heght such that the former 30 will roll over it and at the desired point circumferentially of the ring gear with reference to the stack of strips 34, this punch plate beingin this instance supported by a bracket secured to the bed 20, as clearly shown in Fig. 2. This punch plate carries a series of punches 88 corresponding in number and arrangement to the number and arrangement of the tabs which are to be punched in the overlapping ends of the strip which is wrapped around. the former 38. Likewise, there is provided on the conical surface of the former 30 a die plate 8l (which forms a part of the conical surface) this die plate having a series of dies or openings corresponding 'Y in number and arrangement to the series of punches 80, the whole being so arranged that at each revolution of the former 30 the die plate 8| rolls over the punch plate 19 so that the protruding ends of the punches will enter the die openings. The overlapping ends of the strip 34 which is Wrapped around the former 38 cover the die openings 82 of the die plate 8| so that, as the revolving and rotating former 30 rolls over'the punch plate, tabs are punched inwardly in the overlapped ends of the strip, thus locking the ends.- of the strip together and completing the forma tion of the article. v

In stating that the former 30 rolls over the punch plate, the word over is used in a broad sense, meaning that there is a relative rolling action between the former and the punch plate. For example, the punch plate may be supported at the proper levelv above the bed so that the former will roll along its surface beneath the same. v

As soon as the former 30 passes the punchv plate, the article, which is now completed, is stripped oi the former at its smaller or inner end, and in this instance slides down into or onto any suitable receiving member. The stripping of the articles from the former 30 is preferably accomplished by a suitable stripper wheel 84 ling the subject matter of vand I have, more briefly,

adhesive to which is rotatably supported on the frame or bed 20 inside the ring gear-close to the punch plate 19, as clearly indicated in Fig. 2, so that as the former 30 passes the punch plate the collar or other article thereon comes in contact with the periphery of the stripper wheel which may be formed of rubber, such as sponge rubber, and causes the article to be slid off the former 30 onto or into the receiving member. It will be remembered that the suction which causes the strip to be picked up and held on the former is automatically relieved just before the stripper wheel engages the formed article to remove it from the former 38. In this instance the stripper wheel is mounted on a shaft 85 provided at its outer end with a sheave 86 engaged by a driven belt 81 (Figs. l and 2) passing around a second sheave 88 at the outer end of an upper horizontal shaft 89 supported on the frame 16 and provided at its inner end with a bevel pinion which engages and is rotated by the horizontal bevel gear 24a at the top of the machine.

In this instance the articles when stripped from the former 30 pass down a gooseneck 98, which forms a continuation of the non-rotating shaft about which the former 30 rotates, this gooseneck being a pipe or rod having a vertical portion which extends down beneath the bed 20 in line with the axis of the machine and, therefore, in line with the' axis of revolution of the forming head. Supported at a suitable distance beneath the bed is a turntable 92 adapted to be turned or indexed in a horizontal plane and projecting up from this turntable is a series of receiving pins 93 which areadapted to receive the articles as they slide down off the lower end of the goose.- neck.

The formed articles may be received, however,

in or on receiving members other than those herein referred to, the details of receiving members and of the indexing mechanism therefor, not being material to the present invention.

Above, I have described with considerable detail the adhesive applyingrnechanism constitutthe present invention referred to some associated parts which perform important functions in a particular type of machine, in this instance, a collar forming machine, but I wish it understood 'that I do' not intend to limit the application ofthe adhesiyef applying mechanism to a machine of this particular character, as it may have utility in other types of machines wherein articles are formed into suitable shape, froml paper or other flexible material, and Whose ends are to be secured together by the application of Ia suitable part of the strip, whether or not the holding action of the adhesive is .supplement-ed by other holding means, such as by tabs punched in the overlapping ends.

- member adapted to support a strip of exible material, an arm revolving relative to said member, a stationary gum fountain. gum transferring particular kind of anA means carried by the arm arranged to take a charge of gum from the fountain as it moves past the fountain, and anapplicator also carried by the arm arranged to receive a charge of gum from the transferring means during the same revolution of the arm and to deposit said charge upon said strip as the applicator moves past the strip.

2. In a machine of the character described a member adapted to support a strip of material on which adhesive is adapted to be applied, a revolving head, a stationary gum fountain, a gum transferring member carried bythe head and arranged to take a charge of gum from the fountain as it moves past the same, an applicator also carried by the head and arranged to receive -a charge of gum from the transferring member an applicator onthe other shaft arranged to revolve, a transfer member receive a charge of gum from the transfer member and to deposit said charge upon the strip as the applicator moves past the strip.

4. In a machine of the character described, a Work supporting member, a vertical shaft, a revolving arm carried by said shaft, a pair of shafts carried by saidarm, gearing means for rotating said pair of shafts in opposite directions as they on one of said pair of shafts, an applicator on the other of said pair of shafts adapted to engage said transfer member, a gum fountain supported on the fra'me of the machine, and a gum roller arranged to take gum from said fountain, said transfer member being arranged to contact said gum roller once during each revolution of the arm.

5. In a machine of the character described, a frame, a work supporting member thereon, a bracket carried by the frame above said supporting member, a vertical shaft mounted in the bracket, means for rotating said shaft, an arm carried by said shaft revolving with the shaft above said work supporting member, a pair of shafts carried by said arm, a gum fountain said horizontal shafts mounted on the bracket, a gum roller arranged to take gum from said fountain,l gearing vmeans actuated by the rotation of said vertical'shaft for rotating said pair of shafts as they revolve, a gum transfer member on one of said pair of shafts, and a gum applicator on 'the other of said pair of shafts, said applicator being adapted to contact said transfer member when the applicator is in its uppermost position and to contactwork on the Work supporting member when the applicator is in its lowermost position, said transfer member being adapted to engage said gum roller at one point in the revolution of said arm.

6. In a machinel of the character described, a frame, a Work supporting member thereon, a bracket carried by the frame above said supporting member, a vertical shaft mountedin the bracket, means for rotating said shaft, an arm carried by -said shaft and adapted to revolve with the shaft above said Work supporting member, a pair of vertically spaced horizontal shafts carried by said arm, a gum fountain mounted on the bracket, a gum roller arranged to take gum from said fountain, gearing means actuated by the rotation of said vertical shaft for rotating as they revolve about the vertical shaft,a gum transfer member on the upper horizontal shaft, a gum applicator on the lower horizontal shaft, said applicator being adapted to contact said transfer member when the applicator is inl its uppermost position and to contact work on the Work supporting member When lthe applicator is in its iowermost position, and said transfer member being adapted to engage said gum roller at one point in the revolution of said arm, and means actuated by the rotation of said vertical shaft for rotating said gum roller through a small angle for each revolution of the arm.

7. In a machine of the character described, a support adapted to receive an article to which gum is to be applied, a stationary gum fountain, and a gum transferring and applying mechanism movable with respect to the fountain, said mechanis'm including a member arranged to take a charge of gum from the fountain as the said mechanism moves past the fountain, and a second member arranged to receive the charge of gum from the first member and to deposit the charge upon the article.

HARRY F. AFFELDER.

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