US220925A - Improvement in paper-bag machines - Google Patents

Improvement in paper-bag machines Download PDF


Publication number
US220925A US220925DA US220925A US 220925 A US220925 A US 220925A US 220925D A US220925D A US 220925DA US 220925 A US220925 A US 220925A
United States
Prior art keywords
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Publication date
Application granted granted Critical
Publication of US220925A publication Critical patent/US220925A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current




    • B31B70/00Making flexible containers, e.g. envelopes or bags
    • B31B2160/00Shape of flexible containers
    • B31B2160/20Shape of flexible containers with structural provision for thickness of contents


u e e M 9 S 7| M., 8 e 1 M .f 8 6 2 L c 6.0 .nd TMe HMM e IMM NgP Ka .B E. r .e MD.. a P.. 5 2 9, O 2 2 a N N. PETERS. PHDTO-L|THOGRAPHER. WASHINGTON. D CA 6 Sheets-Sheet 2.
M. E. KNIGHT. Paper-Bag Machine. No. 220,925. Patented Oct. 28, 1879.
. 6'Sheets-Sheet 3.
Paper-Bag Machine. No. 220,925. Patented Oct. 28, |879.
6 Sheets-Sheet 4.
M. E. KNIGHT. Paper-Bag Machine. No. 220,925. Patented Oct. 28, 1879.
r l f f PIES..
6 Sh'eets-Sheet 5 M. E.'KNIGH.T. Paper-Bag Machine.
Patented Oct. 28, 1879.
Specification forming part of Letters Patent No. 220,925, dated October 28, 1879; application filed i July 10, 1879.
To all whom it may concern:
Be it known that I, MARGARET E. KNIGHT, of Springfield, county of Hampden, State of Massachusetts, have invented an Improvement in Paper-Bag Machines, of which the following description, in connection with the accompanying drawings, is a specication.
This invention relates to machines for making paper bags of the Satchel-bottom class, and is an improvement on the machine represented in United States Patent No. 116,842, granted to me July 11, 1571, to which reference may be had.
The paper from a reel is formed into a tube and pasted together before being folded for the bottom of the bag.
This my present invention relates, chiefly, to the main folding-blade and an auxiliary feeding-blade having certain time and order of motion relatively to the linger and side-folders, as hereinafter described, whereby the bottom of the bag is completed, except as to its last fold, in an easy and rapid manner, without tearing or straining it out of shape; also, to the combination, with thc side-folders, of pasting mechanism to apply paste to the said side-folders, they applying paste to one of the overlapping corners of the bagbottom.
Figure 1 represents, in top view, enough of a paper-bag machine to illustrate my present invention; Fig. 2, a side elevation thereof; Fig. 3, a longitudinal vertical section on the line w w, Fig. l; Fig. 4, a View of the delivering end of the machine; and Figs. 5, 6, 7, 8, 9, 10, 1l, and 12 are detail plan or top views and longitudinal sections of thevarious blades, folders, and -iinger constituting the bottomforming devices in the several different positions they will occupy when forming the bottom of the bag, as will be hereinafter fully described. Fig. 13 is a detail of the gearing herein employed at the left-hand side of the machine; and Fig. 14, a detail showing the rst or diamond fold, the second or cross fold, and the third or finishing fold.
The frame a is of suitable shape to sustain the working parts. y
The'former b, abo'ut which the tube of paper is to be formed, will be provided with a follower, such as described in my said patent, or
such as described in United States Patent No. 215,578, it serving to keep the end of the tube open, the end ot' the follower co-operating with the finger, all as described in either of the said patents, and need not therefore be herein further described.
The tube-feedin g rollers c d are arranged to bear upon the under and upper sides of the pasted tube to move it forward over the former b and upon the end of the finger c, and are driven intermittingly to permit the tube to rest at the proper times during the folding of the bottom of the bag and While severing the tube into bag-lengths, all as usual. These rollers will be grooved annularly for the passage of the follower, all as usual.
In this present embodiment of my invention power to drive the machine is applied to the handle e on a shaft or stud, j', havinga pinion, g, which engages and rotates a toothed gear, h, that through a train of gear, 2 3 at 5 6 `7, turns the shaft t', which has upon it the cam 8, that moves the lever j and reciprocates the frame 7c, which carries the tube-severing blade orv knife l, which may be made to operate as described in either of the two patents referred to, no claim being herein made to any part of the said tube-Severin g mechanism. This same shaft t has a cam, m, that moves a link, 9, adjustably connected with an arm, 10, of arockshaft, n, operated in one direction by a spring, 11, and having arms 12, with which are connected links or rods 13, which are at their other ends jointed to the end pieces, 14, ofthe auxiliary feeding-blade o, the end pieces being tted to move in curved guideways 15, open at their lower ends, the connection of the rods or links 13 with the said pieces 14 being by a pivot or pin, as at 16, substantially in the line of the acting front edge of the said blade o, so that as the forward edge of the blade o strikes the paper tube, and the blade passes out from the guideways 15, the said' blade will tip and lie flat upon the paper, so as to readily pass under the main foldingblade p and beyond it, as will be hereinafter described, the blade o being held down upon the bed q by the springs r acting upon the rods 13.
The gear 3 is secured upon the shaft t, ex-
tended across the machine, alid the opposite end of the shaft iliade as a crank, le', alnl is provided with a pinion, 17, that engages an intermediate, 18x, having its shaft 1n slipported by liiiks 2U, the said iiiterliiediate driving the feed-rollers interniittingly throligli the system of gearing showll ill Fig. 2, all of usual construction, and not claimed.
The toothed gear Il, through a traili of gear, c w .1, operates the calii-sllaft y, having lipoii it; cams 21, which strike rollers on al'nis 22, extended backward from a cross-liead, 23, (see Figs. 3, 4,) having other arlns 24, titted in vertical guideways 25, attached to franie a, the said arms having notched plates, for a purpose hereinafter described.
The Canis 21 lift the cross-head, and a spring, 27, depresses it. This cross head Ji luis placed loosely upoli it sliding heads 2" 2f), provided with posts itt 3l, to the upper ends of which are secllred the side folders or pressers a b. This shaft y has a cam, 3;', which acts upon a roller, 33, ot' a lilik, 34, connected with the short arms 35 of two levers, liti, pivoted on bar 36x, aiid provided with lolig slots 37, which receive pills or projections .3S of the sliding heads 28 21), the vibration of the levers 36 acting to move the sliding heads on the cross-1iead, alid consequently also moving the side folders or pressers toward and l`roin each other ill unison, the vertical liiotioli of the cross-liead raising aild lowerilig the side folders or pressers at the proper tiliies, as will be hereinafter described.
The link34 isdrawii down by the spring 39.
The rods 40, supported b v bar LNV, have at their lower ends helical fills 4l, (see Figs. 3, 4,) which are embraced by the ilotclied portions of the arms 21 of the cross-head, alld as the latter is raised alid lowered the rods 4t) have imparted to thelii a rotary reciprocating inotion sucient to move the side-pasters 4. froln the paste-rollers 43 (there, in practice, heilig one paste-roller alid paste-box, 44, at eaeli side of the machine) to a position in contact with the top surface of the side-folders a Il', and apply paste to said folders, so that thc first corner-fold laid over upon the said sidefolders by the second forward movement ot' the main folder p will be pasted at its ulider Side, the side-folders being vlithdrawn from below said folded or overlapping portion laterally.
The paste-roller 43 is rotated interinittiugly by a. pawl, 45, at the elld of a spring'arln, 46, actuated in one direction by a lug, 47, at the rear of pinion 48k@ one of the bagdelivering rollers 49, they be'fgg geared together by pillA ions 50, so as to tu'rn at the salue rate of speed at which the first roller of the pair is rotated by the action of the toothed gear 5l, wlliell derives its niotoli from the pinion ir. The pinion r is secured at one eild of a shaft, 52, provided with a cam, 53, which, by a lilik, 54, is adjustably connected with all arm, 55, of a rock-shaft, 56, having at each end arms 57, connected by links 5S with each end of the main folding-blade p, so that the said blade may turn freely to move in the curved guideways 59, the said blade rising at times entirely above the paper upon the bed, alid at times moving backward alid forward longitudinally lliider the finger c and over the side folding blades or pressers.
The fillger e, pivoted to the foot or holder 6o at the lower end of. a vertically-adjllstable rod, Gl, held by the arch a2, is connected by link 62 with an arm, 63, of a rock-shaft, 64, having at its other end an arm, 65, connected with the upper end of lever 66, having a caln face oi edge, 67, acted upon by a rollcrstud, 68, on a gear, 61), driven by gearing 70 71, the latter gearing beiilg at one end of shaft y. At the rear side of this gear 69 is a shouldered calli or tappet, 72, (shown in dotted lilies, Fig. 2,) it acting upon a toe or lug of all aiin, 73, forked at its outer end to embrace a guided rod, 74, connected at its upper end with the lever 75, that lifts the final-foldiligblade 76, which acts upon the paper after the dialilolid fold has been formed, and forms the final fold for the Img-bottom, passing the paper into the bite of the delivering-rollers 49, between which the completed bag is delivered from the macliiile.
The rod 74 is guided at its lower end by a guide, 77, which also supports a spiral spring, 7S, that sllrloiliids rod 74, and bears the arln 73 up against the tappet 72, the arln 73 restillg against a shoulder, 80, of the said rod. As the arm 73 compresses the spring 78 the rod 74 is drawn down; but as the shoulder of the tappet 72 passes a projection on arlli 71S the spring throws it up alid quickly depresses the tinal folding-blade, 76.
The cams 53 m and 21 32 will be of sllch shape alid so tilned, the one with relation to the other, as to give to the niaili folding-blade aiid auxiliary feeding-blade aiid side-folders the movelileiits and rests in the time alid order liereiliafter descrilied ill the operation ofthe machine.
I desire it to he understood that I lay no claim to the special gearing and driving parts liereili described, alid in practice I may vary tlierefrolu as may be found desirable to attaill the most direct and positive movelnelits with fewest parts alid least friction.
Operation: Referring to Figs. 2 and 3, the inali folding and auxiliary feeding blades p o alld side-folders a b are shown lifted as they will be while the open end of the paper tube is fed upon the point of the linger c. When the tube has beell fed upon the finger for the proper distance, the inain folder p, operated by the cani 53 aiid connecting parts 54, 55, 56, 57, 5S, aiid 5f), is caused to descend lipoll the tube alid pass under the finger, thelatter then, within the open liiouth of the tube, being somewhat raised by tlie stud 68 striking the cani part 67 of the lever 66, acting to turn back the upper ply ot the tube forming the diamond fold, (represented at diagram a", Fig. 14 and then the auxiliary feeding-blade o (a evice not used in my fornier patent) descends upon the paper tube, which has been severed into a bag-length. In this condition the blades are as in Figs. 5, 6, whereinit will also be noticed that the side-folders-liave been moved inward from their outermost positions. (Shown in Fig. l1.) Now, the auxiliary blade o, in moving forward, it being actuated by the links 13,` arms 12, link 9, and cam m on shaft i, turns down substantially parallel with the bed q, and travels along above and in contact with the paper, passing under the main blade p and finger c, striking the paper at the fold represented by the line x2 .ft-2, Fig. 14, carrying the said folded part of the paper forward away from the front edge of blade p, and under the side folders or pressers a b for a distance equal to the distance between the folded part m2 and the line of fold w3, Fig. 14, the sidepressers being yet elevated by the cams 21, after which the cams 2l are rotated, permitting a spring, 27, to throw down the sidefolders to clamp the paper, while the main folding-blade is, by the cam 53, arms 57, and connections witlr the said blade, again moved forward partially over the lowered side-folders, thereby forming the first end fold on the dotted lines x3 x3, or as at a4, Fig. 14, the blades and folders then being as in Figs. 7, 8.
The side-folders, when elevated, were supplied with paste by the side-pasters 42, sothat the under side of th ev paper, folded over thereon by the blade p, becomes pasted.
The folding-blade 19, having reached the p0- sition shown in Figs. 7, 8, now starts back, and as it is being so moved back the sidepressers are also moved outward, the blade p, in its backward movement, resting, or substantiallyso, as it passes from above the sidepressers, the side-pressers in their retreat resting, or substantially so, after they pass out from under the end fold a4. In this condition auxiliary feeding-blade o again starts forward, striking the under side of the diamond fold at the line m2 x2, carrying the folded paper along under the side-folders, whichv are lifted a short distance, and as the blade reaches the position shown in Figs. 9, 10 the final folder, 76, held up by the arm 73, acted upon by the tappet 72, is permitted to descend by the action of the spring 78 on the rod 74, causing the blade 76 to strike the leading end of the diamond fold, forcing it into the bite of the rollers 49, forming the crease or fold represented by dotted lines .r4 no, forming the fold a5, after which the side-pressers are raised a little, and the blade o continues its forward movement to assist in feeding the bag. The side-folders then complete their outward movement through the action of cams` 32, levers 36, and sliding heads 2S 29, the said side-pressers being at the same time elevated through the operation o f cams 2.1, the main folding-blade p during this rising and outward motion of the sidepressers being again started back, leaving the blades as in Figs. ll, l2, wherein the positions of the parts are shown `when the blade o is farthest forward, and from the position shown in Figs. 10, 1l the blades and folders move back to their starting-points, as in Figs. 1
and 3. Just after the final folder, 76, strikes the paper, the side-folders commence to rise and move outward, as before described.
During the latter portion of the forward movement of blade o in contact with the paper on the line m2 x2, it acts as a feed for the tubular severed bag-lengths. The pastors 42 and side-folders leave paste at the points x5 of the bag. (See Fig. 14.)
In my former patent the plate knife folder, after passing under the finger and side-folders, was retracted and again moved forward above the side-folders to complete the iirst corner-fold of the bag-bottom.
By employing the auxiliary feeding-blade to co-operate with the main blade and side folders or pressers, as described, I am enabled to run the machine more rapidly with less waste of paper, and feeding the partially-folded bag by the blade o adds greatly to the certainty of the action of the machine.
Referring to Fig. 14, it will be noticed that the edges of the paper at the central part of the diamond fold are parallel.
Itis necessary to keep the bottom square to keep these edges of the diamond fold parallel, or substantially so, and as the finger runs out of the diamond fold and leaves these edges sepa-rated, the holding part 60 at the rear of the joint of the finger acts to keep these edges in proper place and not permit Ythem to approach each other nearer at one end of the diamond fold than at the other, which would destroy the uniformity of the bag-bottom.
I claiml. In a paper-bag machine, the. main folding-blade and nger to enter and fold back the tube end, combined with the auxiliary feeding-blade, adapted to carry the folded paper beyond the front edge of the main folding-blade, substantially as described.
2. The combination, in a paper-bag machine, of the finger to enter and 'turn back the open end of the tube, the main folding-blade to c0- operate with the iinger and form the diamond fold, the auxiliary feeding-blade to carry the partially-folded bag-bottom -beyond the main folding-blade, the side folders or pressers to descend upon and hold the paper in position While the main folding-blade passes partially over the side folders or pressers to operate upon and fold the tube to complete a satchelbottom, except as to its final fold, substantially as described.
3. The combination, in a paper-bag machine, of the nger to enter and turn back the open end of the tube, the main folding-blade to cooperate with the iinger and form the diamond fold, the auxiliary feeding-blade to carry the partially-tblded bag-bottom beyond the main folding-blade, the side folders or pressers to descend upon and hold the paper in position while the main folding-blade passes partially over the said side folders or pressers to operate upon and fold the tube to complete a Satchel-bottom, except as to its final fold, and the nal-folding blade and delivering-rollers, to operate substantially .as described.
4. The side folder or presser a' and pastoboX 44, combined with the vibrating paster 42, and mechanism, substantially as described, whereby the said paster is made to convey paste from the paste-box and apply it upon the face of the side folder or presser, substantially as described.
5. In a. paper-bag machine, thc combination, with the side folders or presscrs, of pasting mechanism, substantially as described, to apply paste thereon, to be subsequently transferred to the cnd fold a4 of the paper when laid over upon the upper faces of the side folders or presscrs, substantially as described. In testimony whereof I have signed my name to this spccitcation in the presence of two subscribing witnesses. Y Y Y MARGARET E. KNIGHT. Witnesses HENRY A. CHAPIN, E. G. M ACFARLAND.
US220925D Improvement in paper-bag machines Expired - Lifetime US220925A (en)

Publications (1)

Publication Number Publication Date
US220925A true US220925A (en) 1879-10-28



Family Applications (1)

Application Number Title Priority Date Filing Date
US220925D Expired - Lifetime US220925A (en) Improvement in paper-bag machines

Country Status (1)

Country Link
US (1) US220925A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050119093A1 (en) * 2001-04-26 2005-06-02 Miller Donald C. Continuously variable transmission

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050119093A1 (en) * 2001-04-26 2005-06-02 Miller Donald C. Continuously variable transmission

Similar Documents

Publication Publication Date Title
US220925A (en) Improvement in paper-bag machines
US326592A (en) Paper-bag machine
US229296A (en) Art of and machinery for making paper tubes
US558969A (en) Paper-bag machine
US538609A (en) dextee
US837275A (en) Paper-bag machine.
US850605A (en) Paper-bag machine.
US356441A (en) Machine for making paper bags
US239456A (en) Paper-bag machine
US327280A (en) Isiek
US467977A (en) jones
US361951A (en) Paper-bag machine
US200654A (en) Improvement in paper-bag machines
US285392A (en) Machine for making paper bags
US418201A (en) Paper-bag machine
US759786A (en) Bag-machine.
US1362976A (en) Machine for operating on paper
US215578A (en) Improvement in paper-bag machines
US709129A (en) Paper-bag machine.
US446839A (en) Paper-bag machine
US221035A (en) Improvement in paper-bag machines
US949469A (en) Paper-bag machine.
US166988A (en) Improvement in paper-bag machines
US847959A (en) Paper-bag machine.
US267197A (en) Machine for making bags