US1367291A - Envelop-making machine and method - Google Patents

Description

H. Y. ARMSTRONG. ENVELOP MAKING MACHINE AND METHOD.

Patented Feb. 1, 1921.

H. Y. ARMSTRONG. ENVELOP MAKING MACHINE AND METHOD.

APPLICATION FILED FEB-11,1918.

Patented Feb. 1, 1921.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

HARRY Y. ARMSTRONG, OF SPRINGFIELD, MASSACHUSETTS, ASSIGITO TO WILLIAM? L. HALL, OF CHICAGO, ILLINOIS.

R OF ONE-HALF ENVELOP-MAKING MACHINE AND METHOD.

Specification of Letters Iatent.

Patented Feb. 1, 1921.

To all whom it may concern Be it known that I, HARRY Y. ARMSTRONG, a citizen of the United States, and a resident of Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Envelop-Making Machines and Methods; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanylng drawings, and to the characters of reference marked thereon, which form a part of this specification.-

This invention relates to improvements in the art of making envelops and refers to a method of producing envelops and a machine for making them. The invention is herein shown as designed to produce the type of envelop illustrated in my pending application for United States Letters Patent Serial Number 163,871, filed April 23, 1917, wherein the envelop is made from a single piece of paper embracing equal dimension front and rear sections folding one upon the othenand pasted at their end margins and open at one side, one of the sections being provided with a terminal closing flap to be folded flat on the other section and pasted thereto. The invention is adaptable to envelops of other design.

In producing an envelop in accordance with my invention, a sheet or web of paper is unrolled from a roll of paper, supported on a reel, and the paper, as it leaves the roll, tends to assume a permanent set, due to the spiral formation of the web on the roll.

Said web is thereafter so manipulated in folding it' to produce the envelop, that advantage is taken of this set in the paper web when the layers are brought together to ultimately constitute the walls of the envelop, as to cause the spring imparted to the paper web to tend to force the walls away from each other at their central portions or between their pasted margins.

In practising my invention, the web of paper is so drawn from the roll and is so manipulated thereafter in folding it and directing it to the folding means that the outer face of the web, as it leaves the roll, becomes the outer faces of the walls of the envelop tube and of the walls of the complete envelops; and the set of the paper is such as to cause said walls to spring away The invention consists in the combination and arrangement of the parts shown in the drawings and described in the specification, and 1s pomted out in the appended claims.

I have shown in the drawings the elements of the machine for making envelope in accordance with the present invention, sald elements being diagrammatically shown but sufficiently to illustrate the principle of the invention.

As shown by said drawings F1g ure 1 is a perspective, diagrammatic view illustratlng the manner oftaking the web from the supporting roll, and for guid- 1ng it to the folding mechanism, showing themechamsm for folding the web, for applying paste patches thereto, and for severmg the folded web or tube to produce the complete envelops.

Fig. 2 is .a' section on the line 2-2 of Fig. 1, illustrating the folding horn bv whlch the Web is longitudinally folded to produce the envelop tube.

Fig. 3 1s a plan view illustrating the fold ed web and the position of the folding horn relatively thereto.

Fig. 1 is an enlarged view of the flat web showing the spacing of the paste patches applied thereon.

Fig. 5 is an enlarged perspective view of the parts shown in Fig. 4.

Fig. 6 is a perspective sectional view of the envelop tube.'

Fig. 7 illustrates a complete envelop.

Fig. 8 is a longitudinal section of the envelop.

As shown in the drawings, and referring more particularly to Fig. 1, 1O designates a reel on which a roll of the paper web is supported. 11, 12, designate lower and upper scoring rolls, respectively, located in advance of said reel 10 and between which the web, after it leaves :the reel-is trained. The lower roll is provided with circumferentially continuous, spaced scoring knives 14 and the upper roll is provided opposite to the scoring knives with circular grooves 15 to cooperate with said knives. 16 designates a paste aplplying roll which is provided with opposite y disposed paste applying members 17 of suitable length to apply paste patches to the sheet or web. These paste applying members receive paste from a transfer roll 18 that rotates partially submerged in a body of paste in a paste pot 19. Said rolls 11, 12, 16, and 18 will, in practice, be geared to operate in proper sequence to apply the paste patches P to the web at suitable spaced intervals corresponding to the width of the envelops.

Located above said scoring rolls is a guide roll 20 which is obliquelydisposed at an angle of about 45 degrees to the planes of the axes of the roll shafts.

22, 23 designate upper and lower drawing rolls, respectively, which are arranged in advance of the oblique guide roll 20, 24, 25 designated printing rolls, if it be desired to print a return address or like subject matter on the envelops. 26, 27 designate upper and lower cutting or severing rolls by which the envelop tube is transversely severed to produce envelops.

Located between said drawing rolls and the oblique guide roll 20 is a horizontal V shape folding horn 30, and a symmetrically disposed V shape folding form 31 is dis posed parallel to the folding horn as shown in Fig. 2. Said folding horn lies within the form and the tapered edge thereof is directed toward and is located closely adjacent to the inner angle of said form.

The web W from which the envelops are made is somewhat more than twice the width of the completed envelop E shown in Figs. 6 and 7, and is folded upon itself along the score line 6 to produce the front and back wall sections E, E of the envelop, the dimensions of which are equal to each other. The sections of which the front walls constitute a part are continued beyond the side edges of said sections to form closing flaps E he drawing rolls 22, 23 serve, in addition to drawing the paper from the machine, as means for effecting the first or initial squeezing of the paste patches P between the layers of the envelop tube, said patches being applied to the sheet by the paste applylng members 17. For this purpose the upper drawing roll is provided with diametrically opposed limited squeezing areas 32 which act against the face of the lower roll, and said squeezing areas are flanked by parallel relief grooves 33, the purpose of which is to limit the squeezing action of the rolls on the paste patches.

The upper severing or cutting roll 26 is provided with diametrically opposed knives 34:, disposed lengthwise of the roll, and fixed in longitudinal grooves in the roll, with their edges extending slightly beyond the periphery thereof, and said knives are adapted to enter longitudinal grooves 35 in the lower roll 27 in cutting relation to the walls of said grooves. Said knives cut the individual envelops from the envelop tube. Clamping bars 36 are set in grooves in said upper roll which grooves are disposed in planes obliquely to the knife grooves, and backed by springs 37, which serve to clamp or hold the envelop tube between the same and the lower roll 27 during the cutting operation. Said bars also serve to clean the knives of paste which tend to adhere thereto, the knives severing the envelop tube through the paste patches. The severed envelops are carried away from the machine between the adjacent laps of take ofi' belts 38.

The operation of the machine is as follows:

The paper web W is drawn from the upper side of the roll onthe reel 10 and as it passes between the rolls 11 and 12 said web is scored to produce score line e e on the former of which the web is folded to roduce the front and rear walls E E of the envelop and on the latter of which the marginal portion or flap E is folded. As the web passes the paste applying roll 16 the paste applying members 17 contact with that surface of the web which, as the web leaves the roll, is the inner surface; said paste patches being applied at distances apart equal to the width of the complete envelops. The web is directed by the oblique roll 12 to the folding horn 30 and form 31, which latter serve to produce the envelop tube E shown in Fig. 3; the paste patches appearing between the layers of said tube. The drawing and squeezing rolls 22, 23 are so timed that the squeezing areas 32 are always presented to the paste patches to press the layers of the envelop tube thereon. The folded web is advanced by said rolls 22, 23 and, if the printing rolls 24, 25 be presented, the tube is printed as it passes therebetween. The cutting or severmg rolls 26, 27 are so timed as to bring the cutting knives always in position to sever the tube at the paste patches, the paste patches being of such width that when severed paste areas of sufiicient width will be left between the end margins of the envelop walls.

From a consideration of Fig. 1 it will be noted that the outer face of the web as it leaves the roll becomes the outer faces of the Walls of the tubes when folded over the horn 30, and, therefore, the outer faces 'of the walls of the envelops when cut from the tube. The set of the paper produced by the spiral winding thereof around the roll, as

before stated, has the effect to cause the walls to tend to separate and produce the bulging effect shown in Fig. 8.

I claim as my invention,'

1. The method of making envelops which comprises the steps of drawmg a web from a spirally wound roll, and thereafter longitudinally folding the uncut web on itself to produce a continuous envelop tube and transversely cutting said tube all in such manner that the outer face of the web, as it leaves the roll, becomes the outer faces of the complete envelop walls.

2. The method of making envelops, which comprises the ste s of drawing a web from a spirally woun roll, longitudinally folding the uncut web to produce a continuous envelop tube with the outer face of the web, as it leaves the roll, constituting the outer faces of the walls of the tube and transversely severing the tube to produce com-,

' plete envelops.

3. The method of making envelops, which comprises the steps of drawing a web from a spirally-wound roll, longitudinally folding the uncut web to produce a continuous envelo tube with the outer face of the web, as it leaves the roll, constituting the outer faces of the walls of the tube, transversel pasting said tube walls together at longitudinally spaced intervals and transversely severing the tube at the pasted areas.

4. In an envelop making machine, a reel to support a roll of paper web, with means to longitudinally score the, web means for applying transversely patches of paste thereto at intervals and other means to thereafter fold the continuous web along the score line, means to transversely paste the folded web, and means for so directing the web to the folding means that the exterior face of the web as it leaves the reel becomes the outer faces of the envelop structure when it is folded.

5. In an envelop making machine, a reel to support a roll of pa er web, drawing and forming means to ro uce a continuous unbroken envelop tu e, means to transversely paste the tube walls at longitudinally spaced intervals, severin means to sever envelops therefrom, meanslietween the reel and drawing and forming means to a ply transverse aste patches to the web, an a guide roller etween the reel and drawing and forming means arranged to direct the outer face of the web as it leaves the roll to said drawing and forming means so that said outer face of the web becomes, in the envelop tube, the outer faces of the members of the tube.

In testimony whereof I claim the foregoing as my invention, I hereunto append my signature at Springfield, Massachusetts, this 6th day of F ebruar 1918.

,HARRY ARMSTRONG.

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