US2105726A - Strip cutting and applying machine - Google Patents

Description

Jan. 18, 1938. FRlEs 2,105,726

STRIP CUTTING AND APPLYING MACHINE Filed July'22, 1936 6 Sheets-Sheet l 'llll INVENTOR. West-or /'rLe P6; 2%. AAA

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Jan. 18, 1938. N. FRIES STRIP CUTTING AND APPLYING MACHINE Filed July 22, 1936 6 Sheets-Sheet 2 INVENTOR.

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Patented Jan. 18, 1938 UNITED STATES STRIP CUTTING AND APPLYING MACHINE Nestor Fries, Fort Wayne, Ind., assignor to Flashfold Box Corporation, Fort Wayne, Ind.

Application July 22, 1936, Serial No. 91,902

3 Claims.

The invention relates to machines for forming strips and applying the same to various articles. The present embodiment of the invention is particularly directed to the forming of paper or paper board strips and to the securing of the same to paper board articles, such as folding boxes. In certain types of folding boxes, such as the type described in Letters Patent No. 1,699,008, the wall sections and integral corner sections are locked in set-up condition by folding an extending flap on each of two opposite wall sections, over the inwardly collapsed adjacent corner sections and engaging the horizontal edge of the flap behind a strip that is secured to the bottom section of the box or by engaging the free edge of a second fiap that may be carried by the first flap, the second flap contacting the bottom of the box.

Heretofore the strips have been secured by hand to the bottom section of the box blank or to the top section of the box blank at considerable cost in time and money and the object of my invention is to provide a machine that will form the strip and secure it to the box blank in a highly eflicient manner and with a large saving in labor and time. Other objects and advantages of the invention will appear hereinafter.

The invention consists in a machine having novel means by which the material to be treated is fed through the machine, novel means for applying an adhesive to a ribbon or tape of strip forming material and means to cut strips from the ribbon and apply them to the material to be treated.

The invention is illustrated in the accompanying drawings in which Figure 1 is a plan view of a machine embodying the invention.

Fig. 2 is a side elevation of the machine.

Fig. 3 is a cross section on line 33 of Fig. 1.

Fig. 4 is a plan view of a fraction of one of the conveyor belts, and Fig. 5 is a side view of the same.

Fig. 6 is. an elevational view of the conveyor driving ratchet.

Fig. 7 is an enlarged cross section on line 'I-'I of Fig. 6.

Fig. 8 is an end elevation of the conveyor driving ratchet.

Fig. 9 is a plan view of the adhesive applying mechanism.

Fig. 10 is a side elevation of said latter mechanism.

Fig. 11 is a cross section on line IIII of Fig. 9.

Fig. 12 is a plan view of the lower roller of the adhesive applying mechanism.

Fig. 13 is a side elevation of the ribbon feeding mechanism.

Fig. 14 is a side elevation of the operating means of the latter mechanism.

Fig. 15 is an elevation of one of the brakes.

Fig. 16 is a plan view of a box blank having the strips applied thereto and Fig. 1'7 is a cross section on line I'II'I of Fig. 16, the blank being in folded condition.

Referring to the illustrative embodiment of the invention I represents the main frame of the machine which is suitably supported on the floor or other structure. The machine contains two strip cutting and applying mechanisms. As they are duplicates, only one of them will be described. A head 2 is suitably mounted on the frame I and supports a shaft 3 having the gears 4 and 5 splined thereto. The gear 4 meshes with a gear 6 splined on a shaft I and the gear 5 meshes with a gear 8 on the shaft 9. A clutch I8 connects the shaft I to the shaft I I, the shaft I I having a pulley I2 thereon that is driven from any suitable power supply. A plunger I3 is vertically slidably mounted on the head 2 and an eccentric strap I4 is pivotally connected to the plunger and engages an eccentric I5 mounted on the shaft 3 by the rotation of which shaft the plunger is caused to reciprocate. At opposite sides of the plunger and reciprocably supported on the frame I are two rods I 6 that are connected at their upper ends by the cross bar I'I, their lower ends being connected to a die I8. A cam I9 on the shaft "I engages the cross bar I1 and causes the die I8 to descend. A tension plate 20, Figs. 9, 10, 11, is supported in a recess formed in the lower forward edge of the die and it projects below the bottom face of the die and is adapted to contact and hold the material to be treated on the table or top of the main frame as hereafter described. The

- plunger I3 carries a knife ZI (Figs. 9, 11) which,

when said plunger descends, passes through a slot or recess 22 formed in the die I8.

The cam I9 is so formed and positioned that it causes the die I8 to descend prior to the descent of the knife. The die retracts with the knife until the low side of the cam I9 stops it, the knife continuing its upper movement to its uppermost position as controlled by its driving mechanism.

A glue applying mechanism is attached to the die I8 and comprises a receptacle or reservoir 23 (Figs. 9 and 11) having a plate 24 partly covering the open top of the same. A roller 25, (Fig. 11), is revolubly mounted in the receptacle 23,

and a series of grooves 26 is formed in the peripheral surface of the roller. Glue or other adhesive is inserted in the receptacle at the opening 2'! and the roller 25 is turned in the adhesive, the material being carried up in the grooves 26. A scraper blade 28 is adapted to bear on the roller 25 and is mounted on a shaft 29 that extends across the reservoir, and a lever 30 is attached to the shaft by which the shaft may be turned to adjust the blade relatively to the roller. Generally the blade is adjusted to scrape the adhesive from the surface of the ribs 3! on the roller, the adhesive in the grooves being applied to the material being treated. The gr'oc'u'fes are or such" depth as will hold the desired amount of adhesive to be applied. I i

The roller 32 is supported by the frame 33 that is pivotally mounted on theprojecticns 34 bf the opposite side walls of the receptacle by the studs 35. Two plungers 36, opposed by thesprings 31, are mounted in the frame 33 and are adopted to abut the plate 24. A cam shaft 36 engages the upper side'of the frame 33 and'is supported in the brackets 39 that are mounted on the studs 35 and attached by thescrews 46 to the receptacle.

- tilt n the pivots 35 andraise the upper roller for stopping the feeding of the ribbon or tape 42. The plungers 36 normally hold the roller 32 in contact with the roller 25.

Two channels 43 are mounted on opposite sides of the receptacle and project rearwardly therefrom. These channels serve as guides for the ribbon or tape 42 formed of suitable material such as paper board of selected weight. The tape is in a roll 44 revolubly mounted at one end of the main frame and it passes between the rollers 25, 32 and through a slot 45 in the forward end wall of the receptacle 23 and through a V-shaped slot 46 in the die iii. The free end of the tape extends across the slot 22 in the die I 6 and under the knife 2|. A suitable-number of spring opposed pawls 41 is mounted in recesses formed in the die H3. The pawls project into the slot 22 beneath the tape and, when the descending knife severs a strip from the tape, hold the strip in horizontal position as the knife carries the strip through and out of the slot 22 and presses it onto the object below the die 3, that is being treated.

A hand wheel 48 is attached to the shaft of the roller 32 by which to rotate the rollers for initially drawing the tape 42 between the rollers. A gear 49 is attached to the opposite end of the shaft of the roller 32 and meshes with a gear 56 attached to the shaft of the roller 25. A ratchet wheel is also attached to the shaft of the roller 32 and is adapted to be intermittently'rotated by a dog 52 (Fig. 14) mounted on the head 2. A stop 53 engages the ratchet wheel to prevent overrunning and to lock the wheel against reverse movement. 5| to rotate on the upward movement of the reservoir.

A guard 45' protects the slot 45 from the adhesive material. The bolts 54, (Fig. 9), are pivo ally connected to the die 8 in the slots .55 therein,

the receptacle 23 having the slots 56 in the lateral projections 51 thereon to receive the bolts. When the nuts on the bolts are tightened against the projections 51 the receptacle is rigidly attached to the die I8 and hence reciprocates withit.

Two pairs of wheels 6|], 6| are revolubly mounted on opposite sides of the main frame respectively. Pins 62 project at selected intervals from-'the The dog 52 causes the wheelperipheries of the Wheels 66 and are adapted to engage in the aperture 63 formed in the belts 64 that are engaged on the wheels 60, 6|. Openings 65 are formed at selected intervals in each belt and a spring stop 66 is secured on the underside 5 "mountedon the rod '12 so that lateral adjustment of the 'rodsmay'be accomplished to accommodate The rods 69 are also 15 various sizes of material. adjustable on the rods 16. The Wheels 66, 6|

may also be adjusted on their respective shafts in accordance with the size of the material.

A ratchet wheel 73 is mounted on the shaft 14 The rear ends of the rods 16 are slidwhich supports the wheels 60 and an arm is pivotally connected to the shaft and carries a pawl 16. A rod H is pivoted tothe arm 15 and to a crank 18 connected to the shaft 1. The rotation of the shaft l causes the rod TI to rock the arm '55, the downward movement of the arm causing the pawl '76 to turn the ratchet l3 and the shaft the distance of one tooth. The ratchet l3 is'preferably adjustably detachably mounted on a gear '19 that is fixed on the shaft 14. A

pinion '89 mounted on the ratchet engages the l'ill teeth of the gear and the ratchet when released from the gear may be adjusted by rotation on the gear. The intermittent rotation of the shaft 14 causes the wheels 69 to drive the belts 64 intermittently. A brake 8! on the shaft "14 prevents overrunning of the same at any rotation. A form of brake is illustrated in Fig.3 in which a shoe 52 is mounted to engage the rim of the wheel 66. A cam 83 is adapted to force the shoe against the rim. A crank 84 is adapted to rotate the cam t and an adustablerod B5 is connected to the crank and to a crank 86 secured to the shaft 81. A crank 88 is also secured to the shaft 81 and a rod 89 is connected to the crank 88 and loosely engages a lever 96 that is pivoted at 9| and ens-.5

shaft '96 of the other head 2','which head is a duplicate of the head 2 withlike parts, but it isn' turned around 180 degrees so that the die and knife face the die and knife on the head 2. The head 2' is adjustably mounted on the main frame for. movement toward or from the head 2, whereby to accommodate the machine to various sizesn of box blanks. A similar glue applying mechanism 23' and roll of paper board tape are applied to the head 2'. I

The box blanks which aresimilar to the blank A shown in Fig. 16 without the strips B, are feds-.

consecutively onto the carrier belts between the rods 69 and 16, the guides 98 on the rods 69 and the guides 99 on the rods 76 locating the proper position for the deposit of the blanks. The stops 66 on the belts which are in front of the blank en-" gage the edge of the blank and carry'it in stages to a positionunder the dies IS, the guides" I00 causing the blank to center correctly on the base plate or toplfll of the main frame.

The several cams and operating parts arecorrectly timed in operation so that when a blank is carried under the dies 18, those dies with the attached reservoirs descend and their tension plates 20 contact with the blank. The knives then descend, cut off the glued strips B and press them glue side down onto the blank. The dies and knives rise and the belts remove the blank just treated and position the next blank under the dies and knives. As the die-reservoir units rise the ratchet wheels on the upper rollers of the reservoirs contact the dogs 52 and turn one tooth thereby rotating the rollers and feeding the glued tapes into the slots 22 in the dies. The next descent of the knives cuts off the strips B which drop onto the pawls in horizontal position so that the knives push them through the slots in hori- Zontal position into engagement with the box blank. The stripped blanks may be conveyed from the machine in any convenient manner.

It is thus seen that the box blanks are fed successively under the knives and the tapes are fed at right angles to the path of movement of the box blanks, an adhesive being applied to the under side of the tapes as they approach the knives so that the descending knives cut off strips of the tape and apply two of them to each blank simultaneously.

In Fig. 17, I illustrate a sectional view of a fraction of a box blank in set up condition showing the end wall folded over the collapsed corners and a flap on said wall engaged behind the strip B.

What I claim is:

1. In a strip cutting and applying machine, a reciprocating die, means to feed a tape to the die and simultaneously apply an adhesive substance to one side of the tape, a flexible belt having depressible upstanding stops at selected intervals of its length for engaging material to be treated,

means to drive the belt intermittently for carrying the material into and from registration with the die and a knife cooperating with the die and independently reciprocable for cutting a strip from the tape and applying it to the said material.

2. In a strip cutting and applying machine a reciprocating die, a reciprocable knife, a flexible belt to feed material to be treated under the die, means to feed a tape to the die and under the knife comprising a container for an adhesive substance, a pair of rollers supported by the container and adapted to receive and intermittently move the tape between them, one of the rollers being rotatable in the adhesive mixture and having a series of annular grooves in its periphery in which'the adhesive is retained and applied to one side of the moving tape, means to cause rotation of one of the rollers, the knife being adapted to out a strip from the tape and apply it to the said material, means opposing separation of the rollers and means to separate the rollers.

3. In a strip cutting and applying machine, a main frame, a head mounted on the frame, a reciprocable plunger on the head, a knife carried by the plunger, a reciprocable die mounted on the main frame and adapted to receive the knife, means to reciprocate the die in advance of the reciprocation of the plunger, an apertured flexible belt adapted to intermittently travel under the die for carrying material to be treated to and from the die, a pair of rotatable members supporting the belt, at least one of said members having pins projecting from its periphery and adapted to engage in certain of the apertures in the belt for driving the belt and spring stops mounted at other of said apertures in the belt for engaging an edge of the said material to cause the material to travel with the belt.

NESTOR FRIES.

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