US1075033A - Machine for folding wrappers around rectangular tablets. - Google Patents

Description

F. GROVER. MACHINE FOR FOLDING WRAPPERS AROUND RECTANGULAR TABLETS.

APPLIOATION FILED 00T.11,1912.

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F. GROVER. MAGHINE FOR FOLDING WRAPPERS AROUND RECTANGULAR TABLETS.

APPLICATION FILED 0OT.11,1912.

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F. GROVER. MACHINE FOR FOLDING WRAPPEES AROUND RECTANGULAR TABLETS. APPLICATION FILED OGT. 11, 1912. 1 075,033 Patented Oct. 7, 1913. 3 SHEETS-SHEET 3.

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FREDERICK onovnn, or LEEDS, ENGLAND, assl'e'rnon To 'rnn rono'n'ovn MACHINERY COMPANY LIMrrnn, e

E 113E133, ENGLAND.

lviAOI-IINE F012, FOLDING WBIAX EERS AROUND RECTANGULAR, TABLETS.

Application filed October 11, 1912.

T 0 all whom 2'6 may concern Be it known that I, FREDERICK Gnovnn, a subject of the King of Great Britain, residing at Leeds, in the county of York, England, engineer, have invented certain new and useful Improvements in Machines for Folding l/Vrappers Around Rectangular Tablets, and of which the following is a specification.

This invention refers to wrapping machines for folding wrappers around rectangular tablets, such as cubical blocks, and in which the machine operates at times upon more than one of the articles to be wrapped.

The machine to which the present invention refers belongs to that type in which the tablets are carried between top and bottom vertical plungers through an opening, so that the wrapper is folded up on each side and then is advanced horizontally during the succeeding folding operations, the succeeding tablet to be wrapped being commenced to be dealt with by the machine before the wrapping of the preceding tablet is finished.

The present invention refers particularly to the arrangements whereby the vertical plungers are permitted to have their vertical movements to receive and deal with a successive or second tablet imn'iediately the first tablet is traversed by a horizontal plunger or pusher into the horizontal channel in which the successive folding operations are accomplished, and without in fact waiting for the withdrawal of the said horizontal plunger; the said vertical plungers have also such vertical movements, that they rise above the folding mechanism to receive the tablet and the wrapper, being constructed of flat formation and arranged to constitute a cross when placed end to end in order not only to effect a secure grip of the tablet but also to enable the bottom plunger to conveniently pass upward during the operation of the horizontal plunger immediately the latter has forced the first tablet into the horizontal trough.

In the machine according to the present invention it is explained that a tablet to be wrapped is seized between two springheld members of a compound slide, and so advanced on to the wrapper; the tablet and the wrapper are then grasped between the upper and lower vertical plungers, the un- Speoificaticn of Letters Patent.

latentedflct. Z, 1913-. Scria1hl0. 725,122.

planes which act to separate the spring-held. members of the slide and release the tablet. The tablet and its wrapper having been carried down by the vertical plungers into the trough-like structure, through an opening therein by which both edges of the wrapper are turned into an upstanding position, a horizontal slide in the trough-like structure folds over one side of the wrapper and a forked horizontal pusher or plunger forces the partly wrapped tablet and its wrapper beneath a lid or top member of the trough, whereby the other side of the wrapper is folded over the tablet. As soon as the tablet so partly wrapped has been moved by the iorizontal pusher to beneath the top member of the trough-like structure, the lower plunger immediately rises, passing between the bifurcated members of the pusher rod in order, in conjunction with the upper plunger, to support and seize the next tablet and wrapper which is to be dealt with. During the time the plungers are elfecting the movement just described, tucking lingers are vertically moved downward upon each side of the tablet in the trough, and these fingers tuck in the portions of the wrapper, and then outer horizontal slides tuck in the rearward ends of the wrappers and retire. On the retiring of the push and of the outer slides, the vertical plungers bring the next tablet and wrapper into position and when the wrapper of this second tablet has re ceived its folds and is in its turn forced by the bifurcated pusher along the trough, it forces in front of it the first tablet, the remaining folds of the wrapper of which are elfected by stationary guides in the trough.

In the accompanying drawings, Figures 1 and 2 are respectively a part sectional end elevation and a part sectional side elevation of a machine for folding wrappers around cubical tablets, constructed in accordance with my invention. Figs. 3 and 4 are re spectively a part sectional side elevation and a part sectional plan of a portion of the same machine, clearly illustrating the wrapping mechanism. Fig. 5 is a transverse section of a portion of the wrapping mechanism, drawn to an enlarged scale, taken on the line A B of Fig. 8 looking in the direction of the arrow at, and Fig. 6 is a similar sectional view taken on the same line AB but looking in the direction of the arrow y, while Fig. 7 is a further transverse section of the machine carries amain drivingshaft 2, which imparts rotary motion to a series of cams adapted to actuate the wrapping mechanism through the medium of rocking levers pivoted either on stationary shafts 3, .t or on a stationary bracket 5. The tablets 6 to be wrapped (only one of which is shown, as at Fig. 1), are fed forward bya traveling belt 7 carried by two pulleys 8, 9 actuated intermittently through the medium of ratchet gearing 1O operated by cam mechanism 11 while the wrappers 12 are contained in a box 13 over which is located a disk 1 1 mounted on a sleeve 1e carried on a vertical shaft 15 and rotated intermittently step-by-step through the medium of ratchet-mechanism 16 coupled by link and lover connections 17 to a cam 18. The disk 1ft is adapted to be depressed at each interval of rest through a cam and lever mechanism 19 coupled up to its sleeve 14 and the said disk l l is provided with depending pins 14 which, by means of an adhesive applied thereto by rollers 20 rotating in a gum-trough 21, are caused to pick up the wrappers 12 singly and carry them to a position to receive the tablets 6 fed forward by the belt 7 The belt 7 carries the tablets to be wrapped which are placed upon the belt singly, and adjacent to the belt, as shown. in Fig. 1, is a bracket 22 carrying a flat table top at about the level of the top length of the belt and upon which table top of the bracket 22 is fixed an inverted box casing 22*. Slidab-le endwise within the casing 22 is a U-shaped pusher 25, the two ends of which are pivoted to link and lever connections 28 operated by a am 27 so that the U-shaped pusher is intermittently reciprocated.

Slidable between the arms of the J-shaped usher 25 and within the casing 22 is a slide 23 having anupstanding headformed with an incline 23 and carrying at its forward end two depending fingers 24; a compression spring, clearly shown atFig. 1 is fitted between the closed end of the "ti-shaped pusher 25 and the rear part of the slide 23, so that the tendency of the slide is to move rearward between the arms of the U-shaped pusher and to bring the fingers 2% nearer to the closed forward end of the U-shaped pusher so as to grip the tablet when required between the fingers 2dand the forward end of the U-shaped pusher. 1n the position shown in Fig. 1 the fingers 2d are prevented approaching the forward end of the-pusher 25 because th upstanding forward end of the slide 23 is abutting against the stationary casing Obviously as soon as the pusher 25 is advanced toward the left hand as shown in Fig. 1 by means of the lever and cam arrangements which operate it, the advancement of the U-shaped pusher will be coincident with a slight rearward movement of the slide 23', and consequently the tablet 6 standing upon the belt will immediately grasped between the forward end of the pusher 25 and the fingers 2 of the slide; In this way the tablet will. be carried forward off the belt 7 into posi-- tion over and upon the w 'apper .which is held beneath it by the pins l l of the disk 1% which at this time will be stationary. Beneath the carried wrapper on toand above which the tablet has been thus fed, and is held, is mounted a stationary horizontal table 29, in conjunction with which are provided a top plunger 30 and a bottom plunger 31, the top plunger 30 being carried by a bracket 15 fixed to the shaft 15 which is vertically reciprocated by a cam 32 through the medium of pivoted links and levers 33, while the bottom plunger 31 passes thr ugh an aperture 31 in the table 29 and is reciprocated vertically by a cam 3 ft through the medium of a pivoted lever 35. The lower plunger 31 is moved vertically its upper end passing through and above the table 29 until its end comes below the wrapper and tablet, while the upper plunger 30 advances downward, so that the tablet and wrapper are gripped above the table 29 between th ends of the plungers. The plungers then carry the said wrapper and tablet together downward, while cam surfaces 30* formed on the plunger30 sinultaneously engage corresponding inclined surfaces 23 on the spring-slide 23 so as to release the grip of the depending fingers 24 upon the tablet to allow of this downward movement. 7

On the table 29 are fixed a stationary bracket 36 and a stationary channel 37 composed of a pair of side walls 37 fitted with a weighted lid 38 having a projecting portion 38 see Fig. 1, the adjacent ends of said bracket 36 and lid 38 being spaced apart a distance equal to the width of a single tablet; and on the descent of the plungers 30, 31 before referred to, the tablet 6 and its wrapper 12 are carried downward between the projecting portion 38 of the lid 38 and the upper end portion of the bracket 36, by which the sides of the wrapper 12 are turned into an upstanding position upon the tablet 6 (see Fig. 8).

The bracket 36 is fitted'internally with a top slide 39 resting upon an inner bifurcated pusher 4L0 and a pair of outer slides tl (shown more particularly in Figs. 3 to 5), which top slide 39, pusher 40 and outer slides 41 are respectively connected to levers 12, 43, 14 pivoted to the stationary bracket 5. and actuated by face-cams 41-2, 13

4 1* to impart an intermittent reciprocating motion to the said slide and pusher, so as to first cause the top slide 39 to move forward and lie over one upstanding side of the wrapper 12 upon the upper surface of the tablet 6 (see Fig. 9) and then to cause the inner pusher 40 to move forward so as to push the tablet G and its wrapper 12 along the table 29 to beneath the projecting portion 33 of the weighted lid 38 of the channel 37 by which the other upstanding side of the wrapper 12 is laid over upon the upper surface of the tablet 6 (see Fig. 10). At this moment the top and bottom plungers 30, 31 pass upward to receive a secondv wrapper and tablet.

At opposite sides of the projecting portion 38 of the weighted lid 3 are provided end tucking fingers 15 formed on a bracket 4-6 carried by a vertically reciprocating shaft 4:? actuated through a lever 4-8 and cam 4:9 so as to cause the said fingers 15 to descend and simultaneously turn down the two upper projecting ends of the wrapper 12 upon the ends of the tablet 6 (as shown at Fig. 11) while the said tablet is beneath the projection 38 of the weighted lid 38, after which the outer slides 41 are moved forward so as to tuck in the rear projecting ends 05' the wrapper 12 on the tablet 6 as shown at Fig. 12). The top and bottom plungers 30, 31 having by this time grasped between them a second tablet and wrapper, descend, and bring the said second tablet and wrapper down on to the table 29 adjacent to the partially wrapped first tablet 6 still beneath the projection 38 of the weighted lid 38 of the channel 37. The consequent upturning of the sides of the wrap per of the second tablet and the subsequent folding over of the rear side of the wrapper upon the second tablet having been effected as with the first tablet, then the forward movement of this second tablet to beneath projecting portion 38 of the weighted lid 38 to turn down the other upstanding side of the wrapper of the second tablet has the efiect of moving forward the first tablet 6 into the channel 37. The channel 37 is provided with a pair of fixed tapering camplates 50 carried by blocks 51 formed with projecting fingers 51 by which latter the front projecting ends of the wrapper 12 are tucked in upon the said first tablet 6 (see Fig. 13). The second tablet is treated in like manner to the first,and by continuing these operations the tablets are passed into the channel 37 one behind the other, the final turning-up of the projecting lower ends of the wrappers upon their tablets being effected by means of sloping grooves 5O provided between the tapering cam-plates 50 and the correspondingly tapered front ends of the side walls 37 of the channel 37, which sloping grooves 50 guide the said projecting lower ends of the wrapper 12 into an upstanding position against the tablet 6 (as shown at Fig. 14) during the time the latter is being moved along the channel 37 toward the delivery end and so complete the wrapping of the said tablet.

The plungers 30, 31 are of flat formation and so arranged as to constitute a cross when placed end to end in order to not only effect a secure grip upon the tablet but also to enable the bottom plunger 31 to pass up between the bifurcations of the pusher 40 to grip a second tablet during the time the first tablet is engaged by the said pusher, whereby the speed at which the tablets are delivered on to the table 29 is materially increased with a consequent increase of output.

The operation of the machine will now be briefly set out, although the same will doubtless have been understood from the foregoing description :-Each tablet to be wrapped is singly placed on the traveling belt 7 and upon a tablet arriving at the feed mechanism it is gripped between the depending fingers 2+l of the spr'ng slide 23 and the end of the forked pusher 25, and advanced and held above and upon a single w *apper which is ca rried on the depending pins of the disk 14. The tablet and wrapper are thus held abovethe horizontal table 29 upon which the folding operations are carried out; the bottom plunger 31 rises through the table and between the bifurcated members of the pusher 10 to beneath the wrapper, while the top plunger descends and with its cam surfaces 30 releases the tablet from the feed device 23, 25. So held, the plungers carry the tablet and wrapper downward between the plates 36 and 38 whereby the sides of the wrapper are folded upward, see F 8. The slide 39 is moved forward and immediately turns down one side of the wrapper, see Fig. 9. The pusher 40, Fig. 4, at once moves for- Ward and pushes the tablet and wrapper beneath the part 38 folding down the remaining side of the wrapper. At this time the bottom plunger 31 rises through the hole 31 in the table 29 and passes between the bifurcations, of the pusher 4:0 continuing upward. until its upper end comes beneath the second wrapper and tablet which is to be operated upon. During this movement of the vertical plungers the tucking fingers 41-5 are carried vertically downward on each side of the projecting part 38 and tuck in the top ends of the wrapper, and then the outer slides 4-1 are advanced and tuck in the rear ends of the wrapper. The vertical plungers 30, 31 bring down the second wrapper and tablet and the folding operations are carried out on this second wrapper as on the first. When the pusher l0 advances the second tablet and wrapper beneath the projecting end 3S of the lid 38 the first partially wrapped tablet is further advanced through the channel and the forward sides of the wrapper are tucked in by the plates 50, after which, as the tablet is advanced in the channel, the lower ends of the wrapper enter the space below the inclined plates and are turned upward, and so the tablets are delivered in a wrapped condition at the end of the channel. r

I claim as my invention:

1. In machines of the type specified for folding wrappers around rectangular tablets, and in which a wrapper and tablet are supported above an opening formed be tween the forward projecting end of the lid of a trough, and a plate carried on the table of the machine through which opening said wrapper and tablet are forced to turn two opposite sides of the Wrapper in a vertical direction, the combination with an upper plunger adapted to bear upon the said tablet, a lower plunger of narrow oblong rectangular cross section to support said wrapper and tablet above said opening, and means for effecting the vertical reciprocations of said upper and lower plungers, of a forked reciprocating slide moved in one direction to force the partially wrapped tablet into said trough and to permit the said lower plunger to rise to its upper position for supporting another tablet and wrapper before the forked reciprocating slide is moved in the opposite direction, and means for reciprocating the said forked slide.

2. In machines of the type specified for folding. wrappers around rectangular tab the machine throu h which openin said t: .L b V wrapper and tablet are forced to'turn two opposite sides of the wrapper. in a, vertical d1rect1on; the combinatlon wlth a lower 1 plunger of narrow oblong rectangular cross section to support said wrapper and tablet above said opening, an'upper plunger of similar cross section to contact with the upper surface of said tablet and force said wrapper and tablet through said'opening,

the major dimensions of said cross sections of said plungers being arranged at right angles to one another, and means for effect ing the vertical reciprocations of said plunger; of a forked reciprocating slide moved in one direction to force the partially wrapped tablet into said trough and to permit the said lower plunger to rise to its upper position'for supporting another tablet and wrapper before the forked reciproeating slide is moved in the opposite direction, and means for reciprocating the said forked slide.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

FREDERICK GROVER.

Witnesses:

JOHN Jownrr, NELLIE KNArroN.

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

Washington, D. G.

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