US2060616A

US2060616A - Machine for applying adhesive

Info

Publication number: US2060616A
Application number: US39236A
Authority: US
Inventors: Paul W Fleischer; Hofe George W Von
Original assignee: New Jersey Machine Corp
Current assignee: New Jersey Machine Corp
Priority date: 1935-09-05
Filing date: 1935-09-05
Publication date: 1936-11-10
Anticipated expiration: 1953-11-10

Description

Nov. 10, 1936. P. w. FLEISCHER ET AL, 2,060,616

MACHINE FOR APPLYING ADHESIVE Filed Sept. 5, 1935 Aa/W 2 ATTORNEYS Patented Nov. 10, 1936 MACHINE ron APPLYING ADHESIVE Paul W. Fleischer, Weehawken, and George W. von Hofe, Bound Brook, N. J assignors to New Jersey Machine Corporation, Hoboken, N. J., a corporation of New Jersey Application September 5, 1935, Serial No. 39,236

7 Claims.

Our invention relates to gumming machines for applying adhesive to wrappers, labels, paper or similar flexible sheets adapted for use as covers, linings for boxes, cartons, containers or the like.

The invention contemplates the provision of a novel machine whereby a surface of a wrapper, label, paper or similar flexible sheet may be coated with a predetermined pattern of adhesive or, in other words, whereby said adhesive may be efliciently and easily applied only to predetermined portions of said surface while other portions thereof remain uncoated with such adhesive in accordance with the purpose for which said material is to be used. Other more specific purposes will appear from the descriptions and the features of novelty will be pointed out in the claims.

In the accompanying drawing which illustrates an example of the invention without defining its limits, Fig. 1 shows a fragmentary view of a machine embodying the novel gumming mechanism; Fig. 2 is an enlarged bottom view of the novel transfer head; Fig. 3 is a sectional view on the line 33 of Fig. 2; Fig. 4 is a fragmentary view, on an enlarged scale, of the transfer head in engagement with the adhesive applying roll; Figs. 5 and 6 are face views illustrating exifinples of various adhesive patterns capable of being produced by the present method and machine, and Fig. 7 is a sectional view of a sheet or its equivalent in distorted condition to receive an adhesive pattern.

In practice, the sheet a or its equivalent is first distorted for instance in the novel ma chine to be described hereinafter, to force a portion of said sheet a or its equivalent out of the normal surface plane thereof for instance as shown in Fig. '7, in order to provide a recessed surface a and a relief surface a*. The distortion of the sheet a or its equivalent is accomplished in such a manner that the relief surface a will have a configuration correspond-.

ing to the adhesive pattern to be produced, two examples of such pattern being illustrated in Figs. 5,and 6. when the aforesaid distortion of the sheet a or its equivalent has been accomplished adhesive is applied to the relief surface at in any convenient manner-as by brushing or by passing. an adhesive covered roller over said surface a. After the application of the adhesive to the surface a has been 'completed, the sheet a or its equivalent may be restored to its original flat condition so that the adhesive pattem resulting from the application of adhesive to the relief surface a will appear on a surface of said sheet a or its equivalent, which thereafter may be used for its intended purpose. I

In the example of the novel machine as illustrated in Fig. 1, a stack of sheets a or their equivalent is supported to one side of the gumming device in a hopper indicated generally by the reference character Ill, said hopper being suitably supported upon a cross tie ll extending between and secured to two corresponding upright side'frames, only one of which is shown and indicated as l2. Located on the other side of the gumming device is a conventional blank feeding means which as shown may consist of a track l3 supported on the frame I2, said track l3 being provided with slots l4 through which fingers l5 extend for engagement with the box body blanks or similar articles l6 which are adapted to be fed by said fingers l5 along the track l3 into position for receiving the sheets a or their equivalent. The movement of the blanks I6 is effected by the action of the fingers l5 which in the illustrated example are attached to an arm I! capable of horizontal movement on a bar l8 which in turn is mounted to rock about its longitudinal axis and accordingly imparts a rocking action to the arm l1. It isto be understood that the horizontal and rocking movements of the arm I! may be accomplished by any conventional cam mechanism and associated elements; as this cam mechanism and associatedelements per se form no part of the invention, it has not been deemed necessary to illustrate the same.

The previously mentioned gumming device, which is located between the blank feeding means just described and the hopper I 0, may be of any suitable construction and as shown, may consist of a gum applying roll l9 fixed upon a shaft 20 journaled in the uprights of the machine. The shaft 20 may be driven by any conventional means which will maintain the peripheral velocity of the roll IS in proper 'relation to the other parts of the machine. The periphery of the adhesive applying rolllil in the illustrated example is in adhesive receiving relation to the adhesive transferring roll 2| which dips'into a supply of adhesive contained in a bath or tray 22 suitably mounted in the machine.

The sheets a or their equivalent are transferred in individual succession from the stack or hopper I 0 by means of a suction feed head 23 including a chamber 23alan'd having a plate 24 removably attached to the lower portion thereof.

The plate 24 is provided with a series of holes 25 for establishing communication between the chamber 23a and the outside air. On the upper surface of the head 23 is a connection 26 to which is attached a hose 2'! leading to a convenient source of suction not shown. The lower face of the plate 24 has a relief surface 28 and a recessed surface 29, the relief surface 28 corresponding in configuration and formto the specific adhesive pattern desired to be applied to a sheet a or its equivalent when held by means of air pressure against the

surfaces

28 and 29 as will be explained more fully hereinafter.

The head 23 with the attached plate 24 is carried on the lower end of a post 30 slidably mounted within a carrier 3| which itself is slidably mounted upon a rail 32 located above and transversely to the gumming device as exemplified by the gum applying roll l9 and its co-operating elements, said rail 32 being secured at its ends to a pair of cross braces 33 mounted in any convenient manner upon the uprights I2. The suction head 23 is moved vertically by means of levers 34 fixed at one end upon a shaft 35, said levers 34 at their other ends carrying a shaft 36 on which a connecting link 31 is adapted to slide, said connecting link 31 being loosely connected to the upper end of the post 30. The shaft 36 is oscillated in predetermined timed relationship with the movements of the fingers l and bar l8 by means of a cam controlled lever 38 also fixed to the shaft 35, it being understood that the controlling mechanism for operating the lever 38 may be of any conventional design.

Movement of the suction head 23 transversely to the track l3 and the gum applying roll IQ for bringing a sheet a or its equivalent into position above the blank [6, is effected by means of an oscillating lever 39 fixed at its upper end upon a shaft 40 and connected at its lower end by means of a connecting link 4| with the carrier 3|; the

shaft 40 is journaled in suitable bearings at the top of the uprights l2 and is connected with suitable means to effect oscillation of the shaft 40 and lever 39 in properly timed relation to the other parts of the machine.

The operation of the parts described for coating a surface of flexible sheets with predetermined patterns of adhesive is as follows:

During the time the arm I! and fingers l5 are moving to place the blank l6 in position for receiving a sheet a or its equivalent, the suction head 23 has been moved from a position in contact with the uppermost sheet a in the hopper ID to a position immediately above the blank l6 which is in receiving position. It is to be understood that the hopper I8 is provided with an elevating device of any suitable type for maintaining the uppermost sheet of the stack in proper operative relation to the suction head 23. The movement of the suction head 23 is a combined vertical and horizontal movement, the head first being moved upwardly by the action of the

parts

35, 34, 36, 37, and 30, and any conventional cooperating means for imparting movement thereto, to raise the uppermost sheet a, from the top of the stack, such sheet a being caused to adhere to the lower face of the suction head plate 24 by meansof the suction induced in the chamber 23a and holes 25 of said head through the hose connection 21, which, as previously stated, leads to any suitable source of suction, it being understood that the application and discontinuance of the suction is controlled by a properly timed valving means of any suitable form. As the sheet a or its equivalent is subjected to the effect of the suction whereby said sheet a is caused to adhere to the lower face of the plate 24, the sheet will be drawn and held against the relief surface 28 and. the recessed surface 29 of said plate 24 as illustrated in Figs. 3 and 4 of the drawing. As a result'of this, said sheet a or its equivalent will be distorted, or in other words the portion thereof which engages the recessed surface 29 will be forced out of the normal surface plane of said sheet a or its equivalent, which in the illustrated example, means upwardly out of the plane of those parts of said sheet a or its equivalent held in engagement with the relief surface 28 of the plate 24. Inasmuch as the form of the relief surface 28 always corresponds to the shape of the adhesive pattern to be produced, the sheet a or its equivalent will therefore be distorted in accordance with the particular adhesive pattern for which the plate 24 being used is designed. After the head 23 has been moved upwardly with the distorted sheet a or its equivalent adhering thereto, said head is caused to travel horizontally to carry the distorted sheet a across the upper surface of the glue applying roll i 9 as shown in Fig. 4, which roll [9 applies a coat of adhesive to the underside of the sheet a or its equivalent over the desired areas as determined by the relief portion 28 of the plate 24; in its passage across the glue applying roll l9, those parts of the sheet a or its equivalent which are held in contact with the recessed surface 29 will not contact with said roll l9 and accordingly will receive no adhesive therefrom. After the gum has been applied as described, the suction head 23 carries the gummed sheet or its equivalent to a' position immediately above the blank 16. It will be understood that the horizontal movement is imparted to the suction head 23 by causing the carrier 3| to be moved along the rail 32 through the intermediary of the lever 39, link 4|, shaft 40 and a conventional cam or equivalent means with the necessary connections. The blank i6 is supported on the rail I3 so that when the suction head 23 with the gummed sheet a or its equivalent is brought down into contact with said blank IS the gummed areas of said sheet a or its equivalent will be positioned in proper registering relation with the blank l6.

After the sheet a or its equivalent with the adhesive pattern thereon has been pressed into contact with the blank l6, which may be accomplished in any conventional manner, the suction head 23 moves upwardly and then laterally in a return direction at such an elevation that the lower surface of the relief portion 28 will not engage the glue applying roll l9. The suction head 23 will continue to move laterally until it returns into operative relation with the sheets or their equivalent. in the hopper ill from which the suction head 23 will remove the next successive terminal sheet a or its equivalent after which the operations described above will be repeated.

From the above description, the manner in which an adhesive pattern of predetermined form is automatically obtained will be evident, the plate 24, as shown in Fig. 2, being provided with a circular relief surface 28 to produce a circular adhesive pattern, while two of the' many possible variations of adhesive patterns capable of being applied and produced by the novel method and. machine are disclosed in Figs. 5 and 6. In Fig. 5, A represents a box wrapper to which has been applied adhesive according to the pattern B, while Fig. 6 shows a wrap or label A which has the adhesive pattern B applied thereto. It will be obvious that the adhesive patterns B and B are produced by providing plates 24 having relief surfaces 28 which respectively correspond in shape to the patterns B and B, and then performing the operative steps set forth hereinabove. It is to be noted that with the novel machine adhesive patterns having curved, parallel, or non-parallel edges can be easily made by merely changing the configuration of the relief surface 28 of the plate 24, and then selecting the proper platefor attachment to the suction feed head 23.

It is to be distinctly understood that the term sheet as used in the specification is intended to cover and include wrappers, labels, and. paper or similar flexible sheets designed for use as covers or linings for boxes, cartons, containers and the like, as well as any other elements on which it may be desirable to produce predetermined adhesive patterns.

While the apparatus above described represents a satisfactory and practical construction which has proven successful in commercial operation, it

will be understood that the principles of the invention are not limited to the specific constructional details of the various parts which perform the several operative steps herein disclosed, but that many changes, variations and modifications of the constructional details of such parts may be resorted to without departing from the spirit and principles of the invention.

We claim:

1. In an adhesive applying mechanism, in combination an adhesive applying roll, a sheet supporting surface having a design in relief thereon, means for supporting a sheet on said surface in conformity to said relief design, and means for engaging the design conforming parts of said sheet exclusively with said adhesive applying roll whereby an adhesive pattern is produced on said sheet in accordance with the said design in relief.

2. In an adhesive applying mechanism, in combination an adhesive applying roll, means for applying a coating of adhesive thereto, means to distort predetermined portions of a sheet out of its normal surface plane according to a. predetermined pattern, and means to contact exclusively those portions of said distorted sheet which are in accord with said pattern with said adhesive applying roll whereby adhesive is applied to said sheet in accordance with said pattern.

3. In an adhesive applying mechanism, in combination an adhesive applying roll, a sheet supporting plate having a relief surface shaped according 'to a definite pattern, and a recessed surface out of the plane of said relief surface, said relief and recessed surfaces adapted to support a sheet .in surface engagement therewith, and means for bringing only the relief surface of said sheet into exclusive adhesive receiving relation to said adhesive applying roll whereby an adhesive pattern corresponding to said relief surface is produced on said sheet.

4. In an adhesive applying mechanism, a sheet supporting suction head, and a sheet engaging surface on said head having relief and-recessed portions against which a sheet is drawn to distort and hold predetermined portions thereof out of its normal surface plane, the relief portion of said head corresponding in shape to the adhesive pattern to be produced. a

5. In an adhesive applying mechanism, a sheet supporting suction headadapted to distort predetermined portions of a sheet supported thereon out of its normal surface plane in accordance with a predetermined pattern, and means for applying adhesive exclusively to those portions of said distorted sheet which accord with said predetermined pattern.

6. In an adhesive applying mechanism, a sheet supporting head provided with a surface shaped to correspond to a predetermined adhesive pattern, and means for distorting predetermined portions of the supported sheet on said head out of its normal surface plane in accordance with said surface thereof, and means for applying adhesive exclusively to those portions of said distorted sheet which accord with said predetermined pattern.

7. In an adhesive applying mechanism, a. sheet supporting head provided with two surfaces in different parallel planes, one of said surfaces being shaped to correspond to a predetermined adhesive pattern and adapted to position. portions of the sheet in accordance with-said pattern to receive adhesive exclusively and independently of other portions of said sheet PAUL W. FLEISCHER. GEORGE W. vou HOFE.