US2156241A - Outsert attachment - Google Patents

Description

April 25, 1939 T. JENSEN OUTSERT ATTACHMENT Filed March 18, 1957 FIG.2

INVENTOR I J imam BY v ATTORNE? Patented Apr. 25, 1939 UNITED STATES PATENT OFFICE OUTSERT. ATTACHMENT Application March 18,

1 Claim.

This invention relates to improvements in wrapping machines, more particularly to an outsert attachment acting to secure a label band to the main wrapper web by application of heat.

I-Ieretofore various principles were adopted for attaching the label band to the wrapping material, among which was that of melting the wax coating of the label band prior to its application to the wrapping material. However in the latter type the distance between the heating zone and the roll of wrapping material varied with the diameter of the roll during depletion thereof, wherefore the heater members were necessarily held at an excessive temperature requisite for maintaining the fused condition of the band throughout these varying distances, which burned the label band when the heater was left in contact therewith during machine stoppage unless removed manually or automatically. Accordingly, the main object of the invention is to provide heater mechanism whereby a constant distance is maintained between the heating zone and the point of application of the fused band to wrapping material, so that the heater may be kept at a predetermined temperature which will sufficiently fuse the thermoplastic coating of the band without scorching the same when left in contact therewith during machine stoppage.

To this end there is provided a movable frame or support which carries the heater and a roller which rests on the periphery of the roll of wrapping material to press the fused band into adhering relation with the portion of the wrapping material being drawn oif the roll. In the course of its operation the wax or other thermoplastic material coating of the band would accumulate on the surface of this roller, and it is a further object of the invention to remove the accumulated wax in a novel and efficacious manner. For this purpose the heater shoe over which the label band is guided on its way to the wrapping material, extends into proximity to the sealing roller in order to melt the wax thereon.

Since the operation of the wrapping machine is periodic the feeding of the wrapping material is necessarily intermittent and would result in breakage of the label band when the latter assumes an inclined position between the band reel and the heater shoe due to lowering of the same through depletion of the wrapping material roll. To avoid such breakage is still another object of the invention, and with this in mind there is provided a roller aligned with the band reel and over which the band is guided on its way to the heater shoe. The inertia of the 1937, Serial No. 131,651

band reel during its rotation while the band is being drawn off causes overrunning of the reel and thereby creates slack in the stretch between the reel and guide roller, when the feeding of the wrapper material and band is interrupted. This slack is suflicient to prevent breakage of the label when its feeding is resumed. With these and other objects not specifically mentioned in view, the invention consists in certain constructions and combinations hereinafter fully described and then set forth in the appended claim.

In the accompanying drawing which forms a part of this specification and in which like characters of reference indicate the same or like parts:

Fig. 1 is a plan viewof the outsert attachment; and

Fig. 2 is a side View of the same.

Referring to the drawing, the band reel R on shaft 10 is shown suspended from rods II and E2 of the machine by hangers l3 and 14. The heater unit may consist of a resistance heater I5 attached to the heater shoe l6 carried by arms I! and I8 and connected to an electrical supply circuit by wires passing through a switch box (not shown) located at some convenient point of the machine. When the material used for the label band is waxed paper, a temperature in the neighborhood of 300 degrees F. is desirable and a heater of watt capacity has been found satisfactory.

Arms I! and 18 are loosely mounted on a shaft I 9 fastened in brackets 20 and 2| mounted on the frame 22 of the wrapping machine. Said arms are united by tie rods 23 and 24 to form a frame wherein is supported a roller 25 adapted to engage and press the heated label band B on to the roll of Wrapping material R.

The web of wrapping material W may be drawn from the roll R in any suitable manner. If desired, the present wrapper bander may be used in conjunction with the wrapping mechanism disclosed in Patent No. 1,926,245, granted September 12, 1933, on the application of F. R. Schmitt. It may be noted that the present wrapper bander differs from that shown in the patent just mentioned in that the present heater unit for the label band is located in advance of the roll of wrapping material whereby the band B is heat sealed to the wrapping material W immediately as they contact on the roll R.

The label band B is drawn over the rod 24' and then threaded between the rod 24 and heater shoe l6, and thence under roller 25 on to the wrapping material roll R where the roller 25 presses the heated band into adhering relation with the web W. The function of the roller 24 is to maintain the label band in contact with the heater shoe during its passage thereover. As mentioned above, the formation of slack in the horizontal stretch of the band B between the reel R and roller 24' prevents breakage when the feeding of the wrapping material and band is resumed. If the roller 24 were omitted the stretch between the heater shoe and the band reel would assume an inclined position when the diameter of the roll of wrapping material diminished, and would be broken due to its inclined re lation to the heater shoe when feeding was resumed. The banded web of wrapping material is carried along over the various rollers 26, 21, 28 and 29 into the wrapping machine.

The heater shoe [6 is placed close enough to the roller 25 to melt and thus free it of any possible accumulation of wax. In practice a clearance of one ten thousandth of an inch has been found sufficient. Since the arms H and I8 pivot on shaft I9, the sealer roller 25 rests on the wrapper material roll R and continues engaging the same as the same diminishes in diameter. For convenience in replacing a depleted reel of Wrapping material roll by a new roll, the frame consisting of arms I! and l 8 may be lifted up and held in its up-position by a latch arm 30 engaging the tie rod 23, arm 30 being pivotally mounted on a stud carried by a member 3| attached to frame 22.

What is claimed is:

In an apparatus of the class described for sealing together webs of sheet material, at least one of which has a heat-responsive sealing component, a supporting structure including an'upright frame member, rods extending substantially horizontally therefrom, a band web reel supported by hangers depending from said rods at a fixed point relatively remote from said frame member, a Wrapping material roll journaled in fixed position between said band web roll and frame member, directly beneath said rods, a'

swinging bracket associated pivotally with said frame member and having at its free end a pressure roller in position gravity biased into contact with the uppermost arc of said wrapping material roll at all times as the same is depleted, independently of said band Web roll, a sealing element also on said free end of the pivot arm and means to heat said sealing element suitably to render said heat-responsive component effective for sealing purposes and also to heat said pres-.- sure roller adequately to prevent accumulation thereon of said heat-responsive component, and a direction device mounted upon said webs to lead said band web downward substantially in an extension of the radius of said wrapping material roll, substantially in the manner and for the purpose set forth.

'II-IORMOD JENSEN.

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