US1660854A - Wrapping machine - Google Patents

Description

Feb. 2s, 1928.

H. Y. ARMSTRONG WRAPPING MACHINE 6 Sheets-Sheet l Feb. 28. 1928. 1,660,854

H. Y. ARMSTRONG v WRAPPING MACHINE Filed July 22. 1924 6 Sheets-Sheet 2 Feb. 23, 1928.

H. Y. ARMSTRONG WRAPPING MACHINE Filed July 22. 1924 6 Sheets-Sheet 5 Feb. 28, 1928.

. H. Y. ARMSTRONG WRAPPING MACHINE Filed July 22.1924

' 10;? I I a 5 (n M l 6 Sheets-Sheet 4 MenfW' #drryy 47/257707? Feb! #26; i928.

H. Y. ARMSTRONG WRAPPING MACHINE In vvfic r.

Feb. 28, 1928.

. H. Y. ARMSTRONG WRAPPING MACHINE.

Filed July 22. 1924 6 Sheets-Sheet 6 '1 wl'llll III) Patented Feb. 28, 1928.; I

UNI-TED "ST TE A ENT OFFICE.

HARRY Y. nnm'srnone, or s'ynnousn, NEW YORK, ASSIGNOR, BY Mnsn'n' ASSIGN- MENTS, or ONE-HALF; T0 AMERICAN macnmn Ann FOUNDRY COMPANY, A con- PORATION OF NEW JERSEY.

meme MACHINE.

Application median a2, 1924. serial No. 727,425.

This invention relates to improvements in wrapping machines of the. general type shown in my United States Letters Patent- No. 1,626,379, granted April 26, 1927; and refers more particularly to improvements in the means forv feeding the wrapper Web in position to be positioned on or assembledwith the article preparatorytothe wrapping operation; to novel means forcutting' the;

web after the article has been wrapped in and the web is laid and held on the article;

to a novel guide for guiding the web in its travel toward the wrapping niechanlsm, and

constructed also to serve as a"'guard for severing knife,- the latter .preferablyfifid,

so that said guide becomes'a guide and knife guard at theproper time, where it serves to unsheath the'knife and allow the knife to sever the Web, and to other and further improvements in-the details of Web feeding, web wrapping" and. operating mechanism, looking toward simplification of the mechanism and reducing its cost of construction.

in the drawings showing the essential w parts of one embodiment of the nvention:

Figure l is a. side view of the machine, with parts omitted.

Figure 2 is a top plan view with-parts broken away.

Figure 3 is a plan section showing the,

frame and operating mechanisms.

Figures 4 and 5 are plan views of the pivoted article centering mechanism for the end tucker blades.

Figure 6 is a. detail of the article feed plunger and its operating mechanisnr Fig. (i is a detail of the transfer element actuating cam. g Figure l is a detail of the package ejector and its operating mechanism.

Figure .3 is a detail of the web feed.

Figure 9 illustrates the Web severingknife guard and its operating-cam; l igure 10 is a. fragmentary plan view of an adjustable guide for the web;

Figure 11 is a section on the line .1111 of Figure 10.

Figure 12 is a top plan view of the Web severing knife and the web guide and knife guard.

Figures 13 and liare sectiQn o t e n ferent operative positions.

Figure 15 illustrates parts of the castings 13-13.of Figure 12, with/the parts in difwhich carry one pair of the endfiap folding 'several'steps of wrapping the article.

As shown in' the drawings, 22 designates theside and end members of ajskeleton base supported on legs 23 having upward extensions 24, said extensions being connected by cross' members 25, 26, which latter support longitudinal side members27.

The article to be wrapped is fed by a feed plunger 31 from a support 30' to the 'receiving end of a verticallyswinging transfer element 32 that is pivotedon. a shaft 34: to swing at its free end betweenthe plane of said support 30 and the receiving end of a runway 15 over which the wrapped articles are discharged. :Said transfer element is swung on its pivotthrough the agency of a lag; 28hav1ng a roll 29 that travels in a cam track 35' of a. cam member 35 fast on a rotatable shaft 36 and driven by intermeshing gear 50 and pinion 51, the latter fixed to a "nism' consisting of a crank arm 36 fast'to a.

transverse rock shaft 39, the one end of which is fixed to a crank arm 41 to which is pivotally connected the rear end of a link 40, the front end of which is guided on the crank shaft 36, and isprovided with a roll 42 which travels in a cane track 41-3 in one face of a cam disc 41 1 that 1s fast to said shaft 36. The rear end of said link l0 being pivoted to the crank arm 41 of the rock shaft 39.. causes the crank arm, 38 to give reciprocating movement to the plunger 31.

The article and web are forced onto the transfer element against a spring-pressed. gripper 130, also carried by the transfer element, and which serves to hold the-rear, fold to on the article. Said gripper is guided by engagement of its shank 131 with suitable guides 132, 133 on the transfer element, and is held normally in its rearmost position by a spring 1341 fixed atone end to alug on said shank and at its other end to an upstanding lug on the rear guide bar 132; a stop 131 limiting the total rearward movement of said gripper. I

The wrapped articles aredischarged from the transfer element on and over the runway 45 by a bifurcated pusher (Figures 1, 2 and 7) suspended from a cross shaft 56 that travels at its ends in guides 57 of the upper side frame bars 27; and said pusher is operated by a link 60 pivoted at one end to said shaft 56 and at its other end to a crank arm 61 that is fast on the shaft 34, said shaft 3-41 having a short crank arm 63 that is pivoted to a link 64 (Figures '1 and 7 )which has a cam roll 65 that travels in a cam track 66 of a cam 67 fast to said shaft 36, looped to be guided by said shaft.

The article A is pushed by the plunger 31 from the support 30 onto the rear end of the transfer element 32 when the iatter is swung down into the plane of said support 30, and the moving article carries with it a portion of the web \V that was theretofore draped across the path of said article (Figure 17). The Web TV, in the end of which the articles are wrapped, is drawn from a reel W carried by the frame and thence over a guide pulley 68 and over a table 69 above' the support 80, where it is guided between laterally adjustable gauges 70 mounted on a right and left hand screw shaft 71 to adjust the machine to different web Widths (Figures 10 and 11).- A rocking eccentric back stop 72 prevents backward withdrawal ofthe wrapper at all times; and a brake bar 73 (Figures 1 and 10)' may be employed and operated in'suitable timed relation to the web severance period to prevent tendency. of the web being drawn forward during the severance period. a v i The web is initially trained from the table 69 beneath a web feed roll 75 carried by the free front end of a swinging arm 76 that is vibrated vertically across the vfront of the support 30 (Figure 1) to drape the web" across the path of the article to be wrapped (Figure 17). The hub 77 of said arm 76 is pivoted to a transverse rock shaft 77, mounted in abracket 77 A link 79 is adjustably pivoted at one end to the slotted end of a crank 80 integral with the hub 77 and has looped guiding engagement at itsother end with the shaft 36. Said'link carries a cam roll 81 which travels in a track 82 of a cam 83 fast on the shaft 36 to vibrate said lever 76 and carry the web feed roll through the arc indicatedjn Figures 1 and 8, by the full and dotted line positions of the roll 75, in

each rotation of the shaft 36 and therefore in each cycle of operation of the machine.

\Vhen the article passes onto the transfer element, it carries with it a loop of the web end to partly wrap the article therein to produce a partial bottom fold to, a front 110 (Figure 2).

of different length.

fold w and a .top fold w? (Figure 18). There is also produeedin this movement end flaps w" and lower and upper triangular part flaps 10* and '20, respectively; said tiaps being formed by the faces and the bottom and top edges, respectively, of flap folding blades 85 that are carried by and move with 26, whereby the pivots can be adjusted towards and away from each other, and the blades 86 are allowed to swing on said pivots against theaction of a restraining spring This gives adjustment for length.

The blades 85, are fixed at their front ends to brackets 85, 'each having a pair of out wardly extending stems ll l 'that slidingly engage apertures in therear arms of castings 102 in such a manner that the blades and their brackets can be moved towards and from each other and can be locked to the castings by screws 116. This is'one adjust-mcnt for the blades 85 for the lengths of articles. Said castings are pivoted at their front ends on studs 103 which extend through sleeves 103 and the studs of the castings are adjustably fixed in slotted brackets 120 of the machine, whereby the pivot ends of the castings can be adjusted towards and from each other, in the manner of the pivot studs 87 for the blades 86 to give another adjustment function to articles from each other, when the transfer element it. at the lowermost part of the arc of its The rear ends of'the arms'and the blades 85 are spread away movement by engagement of rollers 105 with side cams 106 (Figures 1', 4 and 5) that are fixed to opposite sides of the gear 50, and said blades begin to swing toward each other under the action of the spring 110 (Figure 2) when the/article is moved partially onto the transfer element (Figure 5). The mounting castings 102 are supported on and more with the transfer element. and the transfer element is longitudinally cut. away to pernii t the gear 50 to extend upwardly therethrough The free ends of the blades 85. 86 are swung laterallyin unlsorn through the action of the spreading cams 1.06. by means of lugs 107 on the front ends of the blades 86 which overlap and slide vertically along the elongated, upright curved bars 108 fixed to the adjacent ends of the blades 85; the-said lugs andhars cooperating with end to the position indicated in Figure v of the folds 10 over the flaps to,

the 31431018. Compensating gearing may 'ing cams 106 pass gradually away from the the spreading cams and said tensile spring flaps 10 and the triangular flaps w, are 110 to maintain the free ends of the blades thrown upwardly against all of the flaps to 85, 86 equally pressed toward the wrapped produce the final end flaps w of Figure 21 article ends to iron the end flaps thereof by the passage of the opposing triangular in all positions of adjustment of the pivot flaps w 10 through oblique slots 92 formed pins or studs 87 and 103. Equalizingar'ms betweenthe rear oblique edges of the blades 118, fast to. the 'JlVOlJ ends of the Castings 86 and corresponding oblique edges 93 of 102, overlap eac other, one carrying an plates 94 which lie in the planes of the blades eccentric pin 122 which extends through 86 and flank the runway rearwardly beyond a slot in the other. This connection. compels said blades. The side plates 94 of the runequal movement of the blades 55, positively centr'alizes the article on' transfer 'a1'tic1e ends until brought into contact with element and. runway when the blades are side electrically heated hot plates 96 that rise forced toward each other, from the position from a long transverse bottom hot plate 98, shown in Fig. 5, against the end flaps of 'which'constitute; trough-like extensions of be the runway, and heat seals the folds and substituted for the slotted arm connection. flaps when the wrapper. material is wax The eccentricity of the pin 122 enables exact paper. i Paste applying and closing niechacentering of the article to be obtained relanisms m ay obviously be substituted for the tively to Center line of the milChil1 heat sealing devices. The i'earmost part 99 After the partially" wrapped article has of said bottom, and corresponding portions been'delivered by the transfer elementand 100 of the side plates are ribbed to chill and the web partially folded thereon, and with t the sealing wax or paste o f-the wrapper the blades 85, 86 spread apart, the spread material.

The side hot plates 96, the said plates rolls of the pivot castings so as o p r- 94, and the side plates 100 are all connected unit the free ends of the flap folding blades. together as lateral symmetrical units by eleto move gradually together under the action ments 101 and are adapted to vbe adjusted of the spring 110, and thus cause the blades simultaneously inwardly or outwardly to press on the'end flaps of the article for through the medium of a right and left hand which the Ina-Chin is a j d to c e y Set screw 125 whichhas suitable rotative bearing the said flaps .on the articleends. Stops 113 in the main fr me and engages nuts 126 adjustably fitted b0 transfer member 32 movable with aid units and is turned by a by the slots shown in Figure 2 limit the total h nd wh el 126. Springs back the plates 9% iIIWEIICl movement of Said i g 102 i and hot plates 95'to resiliently hold the end each adjustment o sa d s ep I flaps against the article while being guided When the tree or rear-end of the transfer d l l .l element and the partially wrapped article, I o ratio the and {lap folding blades thereon fi g upwardly, the triangular 85 86 are swung away from each other as HELPS g are folded 0 y he the articles'are moved from the support 30 flap 'fO d g blades 8 toward h article to the transfer element, such spreading being 19 brought about by the spreading cams 106 to constitute a part of the top laps 10% which acting on the rollers 105 of the pivot castings said top flaps will be completed in the fur- 102 d th ti n f th bars 108 f th ther folding operation by laying thereovcl blades 85 with the lugs 107 of the blades 86, the triangular flaps w which, during the swinging the latter on their pivot studs 87, raising movement of the transfer element,- andas the side cams 106 pass away from the passthrough oblique slots 87 of the folding rollers 105, the spring 110' causes the blades blades 86. When the transfer element is 85, 86, to yieldingly wipe the end flaps to thus lifted, it also pulls the told 70 down preliminarily hold them together before over the rear side of the article, and the end passing onto the hot plates 96; and by reason extensions oi said' fold pass through slots of the fact that the jlast laid bottom told 87, with the triangular flaps w toproduce w" is a trailingfold it will cause the side the configuration of the flaps shown in Figwrapping to be held tight on the article iuitil ure l9. Thereafter, when the partially it reaches the bottom runway 45.

wrapped article ist'orced rearwardly from The web is severed after the half bottom the transfer element onto the runway, the fold has been pinched between the article and depending portion to oi": the web is toldecbthe bottom of the runway (and thereby underneath the article in overlappedrelation avoid slackening or the wrapper away to the fold w, and at this time the triangular fronr the article) by the stationary knife 90 flaps w 'are folded, with theend eirtension's at the bottom of the runway and normally w" to pro f guarded from contact with the web by a duce the full flapsw l of Figures 20 and 21. transverse web guide and knife guard 140 During this movement also the triangular which normally lies, under the knife 90 flaps w, which were formed between the] (Figures 1, 12 and 13) andisadapted at 86 and way hold the end flaps together and on the v the proper time to be moved rearwardly to expose the knife so as to cut the web (Figures 9 and 14). If the brake bar be em ployed, it will at this time be moved downwardly to pinch the web between it and the plate 69 and thus brake movement of the web-as it is being severed. Said guide and frame bar 22 (Figure 1). .The forward end,

of the link has-thereon a cam roll 150 en gaging with a cam track 151 in a cam 152 fast on the shaft 36 exterior, to the frame bar i 22. The cam 152 is adapted to be angularly adjusted on the shaft 36"by theset screw 152 so as to' vary the time of throw of the guide and knife guard bar and thereby regulate the width of the last half bottom fold 'w" and the amount of its overlap on the first half bottom fold 10. Likewise, the slotted connection of the link or-bar -79 to the crank arm 80 of the roll carryingarm 76 permits of adjustment'which will vary theextent of lap-of the first bottom half fold to on the.

article and toadjust for diilerent width articles.

It will thus be understood that Figure 1 shows the parts in position with an article partially side and end wrapped preparatory to forcing it on the runway to complete side and endwrapping and that the knife .will' not be uncoveredto sever the web until after the last bottom half fold 'w is pinched between the article and the bottom of the runway. It will also be understood that before the web is severed the roll 75 is moving down to carry a loop of the web across the support 30, so that the web is not only drawn tightly 'on the article, but additional web lengthisbeing drawn from the roll W. When the Web is-severed by the knife the roll 75 will straighten the free end of the web to the position shown in Figure 17; the lowest dotted circle in Figure 1 denoting the end of the throw of said web feed roll; and the descending transfer element will complete.

I said drape.

It will also be noted that the article and web are fed in three stages,-the first by the plunger 31 to move the article and a loop of the web onto the transfer element 32; the second when the free end of the transfer element is lifted to the plane of the runway, and the third when the pusher" forces the article and web onto and over the runway; and that during all this time the article is being wrapped in the free end of the web. Practically the entire.circumferential wrapping is effected before the severance of the web, and the end flap folding is partly completed after the severance of said web.

ee oeea articles of considerably varying dimensions H and contours. I

It will be furthermore observed that the difierent elements of the side and end folding elements may be made as standard or stock parts to be adapted to a standard frame and that adjustment of said elements can be made within or relative to each other and the frameto adapt a single machine" to wrappingarticles of widely varying dimensions, within limits.

In the construction shown,-it will be noted that the severingknife extends transversely across the width of the runway. and is fixed to the enterin tute the receiving portion of the runway bottom end, as in the position shown in Figure 13. This disposition of the parts is advantageous inasmuch as it constitutes avery compact assembly of the'parts and provides it simple way of entering :the, partially wrapped package onto the runway to finish the trailing fold Q09 of the web end beneath the article so as to prevent the wrapperfrom slacking away from the article after the severance of the web takes place and main-' tains a smooth'circumferentially wrapped end thereof so as to constias i relative to the knife edge to unsheath the latter for severing operation.

*2. In combination, means to move a web, a knife in position to sever said web, a web guide bar normally sheathing said knife, and means for moving said bar transversely relative to said knife to unshcath the same.

3. In combination, means for moving a web to be severed, a fixed knife having an edge in position to sever said web trans versely as it is moved past the same, a web guide bar normall extending longitudinally of and at its gui ing edge laterally beyond the cutting edge of the knife, and means to sheath said 'bar laterally away from said cutting edge.

1. In combination, means for moving a web, a knife having an edge in position to sever said web as it moves past the same, a web guide bar normally sheathing said edge,

and means to operate said bar'between sheathing and unsheathing positions.

5. In combination, means for moving a web, a knife in position to sever the web as it is moved past the same, a web guide bar normally sheathing said knife, a swinging arm to support said bar, means to swing said arm, and a cam to control swinging movement 01% said armv 6. In combination, a fixed severin knife, carry said bar and fixed on said shaft, a cam, means for moving a, wrapping material past and opert ve connections between said last said knife in position to be severed thereby, arm and said cam, 10

a bar normally to sheath said knife, and In witness'whereof I claim the foregoing means to shift said bar relative to said as my invention, I hereunto append my sigknife comprising a rocking crank arm, a. nature this 14th day of July, 1924; shaft to vghich said arm is fixed, an annto HARRY Y. ARMSTRONG.

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