US416474A - Bag-sewing machine - Google Patents

Description

(No Model.) 5 Sheets-Sheet 1` J. L. LOWE. BAG SEWING MACHINE.

Patented Dec. 3, 1889.

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No. 416,474. Patented 1344.3, v1889.

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No. 416,474. PatentedDeo. 3, 1889.

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l BAG SEWING MACHINE. v No. 416,474. Patented Deo. 3, 1889.

WYTWESSES Adil UNITED- STATES f PATENT OFFICE. l

' JAMES L. LOWE, oF DURHAM, NORTH CAROLINA, AssIeNoE To THE GOLDEN BELT MANUFACTURING COMPANY, OF sAME PLACE.

BAG-SEWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 416,474, dated December 3, 1889.

i Application ledMay I5, 1889. Serial No. 310,804. (No model.)

ToaZZ whom it 'n1/ay concern:

Be it known that I, JAMES I.. LOWE, of Durham, county of Durham, and State of North Carolina, have invented certain new anduseful Improvements in Bag-Machines, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to improvements in machines for making clothV into bags, and especially for making tobacco -bags, though also adapted to make bags of larger size.

In order that the operation of mymachine may be more readily comprehended in detail, I will give a general description of its4 Inode of operation.

Cloth of desired width is mounted upon a spool and passed beneath a roller, which stretches it between the spool and the roller, Between these parts are located hemmers and sewing-machines, which fold each edge of the cloth and sew it down.` The cloth is next folded in the middle and then pressed and creased between vertical rollers. It is then turned from the vertical to the horizontal position and is passed beneath another roller,

which operates to drawfit through the ma.

chine. It is then passed by means of an intermittingly-moving roller to a knife which is adjusted to cut off a piece of the desired width. This piece is then passed from the knife to a second set of machines, which sew it up the sides and complete the bag.

An objection has hitherto existed against bag-machines, ,because the sewing of the sides of the bag together, which is preferably done by a single-thread machines, is commenced at 'the bottom and ends at the top. yThe consequence is that, stitching. of this description being easy to ravel backward, the mouth of the bag, upon which is the greatestV strain in use, is weakened, so that, in fact, it has been found necessary almost to entirely discard single-thread machines in practice. In my invention I reverse the operation and sew fromthe top to the bottom. In my machine Vall the sewing-machines are onone plane and the needle-bars work in vertical planes. By this means the machine itself is simplified and the operation is direct.

In the accompanying drawings, Figure lis a plan view of the upper side of my machine, showing it filled with cloth, as in use. Fig. 2 is a plan view of the bottom of my machine. Fig. 3-is an elevation of one side of my ma- 5 5 chine, and Fig. Il an elevation of the opposite side. Fig. 5 is a section along the line fr of Fig. l, showing the cutting-machine and the feed to the second set of machines. Figs. b' and 7 are detail Views of parts of my ma- 6o chine detached.

In the above-described illustration the bed of the machine and the parts connected therewith are shown without means of support, as the bed maybe supported by legs or by usual means, the showing of which would have tended to obscure the working parts. Thread in practice is supplied to the sewing-machines from large spools fixed upon the floor beneath the machine; but these are not indicated in 7o the drawings. i

Referring to the letters upon the drawings, A indicates the bed-plate of my machine.

B indicates a main driving-shaft, and C a split pulley secured thereto.

D D indicate cog-gears adjustably secured to the shaft B and gearing with the pinions E E of the sewing-machine F F. The sewingmachines are sunk below the surface of the bed-plate, so that their feed-plates are in the 8o same plane with the bed-plate of the machine proper. They may be of any desired pattern or construction; but it is preferable to use singlethread machines, the right and left machine being adapted inY a wellknown manner to feedin the same direction. The machines F F are in practice generally made adjustable upon the bed-'plate A,.so as to suit different widths of cloth.

G indicates a support for the spool H, and 9o I Ihemmers for folding each side of the cloth before it reaches the machine. Mountedupon; the bedplate is a knurled roller J, upon one,v end of whose axis is carried a worm-threaded pulley K, through which, by means of the stirrup-gear L and worm M, motion is communicated from the shaft B to the roller J. The worm M isweighted at its outer end, so that it may be readily detached from the pulley K. Any well-known means, however, of forming Ioo a detachable connection between said pulley and the shaft B maybe adopted.

N indicates a revolving shaft supported upon thc bed-plate A and receiving motion through the spur-gearing O from the axis of the roller J. By means of the spur-gear P motion is imparted from the shaft N to the shaft Q, and that through the spur-gear R imparts motion to the vertical roller S, which is supported by the frame 'l upon the bedplate A. In contact with the roller S is a corresponding roller S', which by friction derives its motion from the roller S.

U indicates a folder, which consists of a standard supported upon the bed-plate and carrying at its upper end athin-edged roller, which serves to fold the cloth in the middle and to present it folded to the rollers S S.

V indicates a guide. lt consists of a sheet of metal folded so as to leave a space between the parts and twisted lso that one end is at right angles to the opposite end of it. The folded cloth fromthe rollers S S is passed into the guide and turned by it from avertical to a horizont-al position, and there presented to the roller XV, which is journaled upon the bed-plate A, and by means of the spur-gear X derives a constant motion from the shaft N. The velocities of the rollers J, S, S, and WV are equal, but are less than that of the shaft B, to which they are geared, being regulated to the feed of the sewing-machine.

Y indicates a roller journaled upon the bedplate and carrying loose upon its axis A the worm gear wheel B', which, by means of the pawl-and-ratchet mechanism C', (shown in Fig. 6,) is adapted to communicate motion in one direction to the roller Y.

D indicates a vertical worm, which gears with the wheel B', and is pivotally carried upon the knife-head E by the arm F. By this `means it willf appear that when the knifehead descends the gear-wheel l5 will turn loosely upon its axis; but when it moves in the opposite direction it willy cause the roller Y to revolve. While the roller Y is stationary there is an accumulation of cloth between it and the roller lV, which may be taken up in `any convenient way--for instance, by a rod a passing underneath thc cloth and held against it by the cord l), attached to it at one end and weighted at the other, as shown in the drawings. The wheel B in practice is so geared with its worm D as to impart a high velocity to the :roller Y and to take up all the accumulated slack of the cloth while the knife-head is ascending.

G indicates guides or beariu gs secured to the bed-plate A and carrying the verticallymovable 1odsI[,the upper end of each of which is secured to the knife-head E', carrying the knife I. An intermittent motion is imparted to the knife-head E', so that when the cloth has been fed out by the roller Y to any predetermined length the knife descends and cuts it off. Instantly.succeeding this operation the claw K seizes the cloth and pushes it in the direction of the sewing-machines L', which operate in the same manner as those described above. The claw is` operated by the rod M,which rides upon the rollers N', projecting from a support secured to the knife-headE, in practice preferably made adjustable. The rod M is adjustably sccured by means of the slots c and thumb- Z indicates another ycam 4borne upon the Y,

shaft A2 and geared to the shaft Q.

B2 indicates a frame adapted to receive a reciprocating motion from the cam Z. It slides in the hanger C2, and is secured at one end by the rod D2 to the rod O and vat the other by a spiral spring E2 to a perpendicular projection extending from the bed-plate A.

F2 indicates spiral springs secured at one end to the bottomof the bed-plate A and at the other to the cross-bar V. j

j The abovementioned springs serve to` hold their respective bearings against each of said cams. The springs F2 assist the cam W to operate the knife by tending' to keep it elevated. The spring E2 assists the cam to operate the claw K', and giversl to the latter an abrupt retraction after it has completed each push. y

p The above-named cams are so geared to the shaft Q and so timed with reference to each other that when the cam XV is at its lowest p oint the cam Z is at its farthest throw; In other words, when the knife-head E is in its highest position the claw K has been pushed forward toits limit. It will be observed that the cam W is a regular round earn of usual construction,while Z is irregular, and adapted to impart an abrupt quick movement to the frame B2, and through it to the claw l.

G2 indicates a brake pivoted to the bedplate, and pressed by the spring H2 against the spool 1I to retard its motion and prevent its paying off the cloth too fast to the sewingmachines.

It is preferable in practice to make the feed-rollers adjustable to suit different thicknesses of cloth. p

In Fig. '7, e indicates a roller-journal, which is provided with pins ff, corresponding to the dowels g in the bed-plate of the machine. Beneath the bed-plate is fastened a support h for the nut t', which is screw-threaded to receive the screw 7s, secured at its upper end to the journal e. A turn or two upon the nut t' is suiicient to afford the slight adjustment necessary for the feed-roller.

IOO

IIO

What I claim isl. A bag-machine consisting of the following elements in combination, namely: a pair of folders to turn the edges of the cloth down upon the body, a pair of sewing-machines to complete the hems, a horizontal feed-roller to assist the feed of the said machines, two yertical presser-rollers, afolder between thehoriv zontal and the Vertical rollers to double the of the bag, substantially as described.

3. In a bag-machine, the combination, with two sewing-machines and hemmers, of la cutter, a folder between the said machines and the cutter, and machines for sewing up the sides of the bag, substantially as described.

4. In a machine by which a roll of cloth is hemmed, folded, cut into sizes, and stitched together into bags, the combination of a set of vertical rollers to press together the folded cloth, a horizontal feed-roller, and a guide by which the clothis passed fromthe Vertical rollers to the horizontal one, substantially as described.

5. In a bag-machine, the combination,with

a pair of sewing-n1achines and hemmers, of a cutter, folding` mechanism between the said machines and the cutter, a' second pair of sewing-machines to stitch up the sides of the bag, and a horizontal feed mechanism between the cutter and the second set of machines, whereby the folded material is stitched from the hem toward the crease to form. a bag, substantially as described.

G. In a bag-machine provided with an alternately-moving knife and feed-roller, the combination of a Worm geared Wheel turning` loose upon the axis of said roller, a pawl-and- .ratchet connection between said axis and said wheel, and a Worm carried upon the head of said knife and adapted to gear with said wheel, and thereby impart an intermittent motion to said roller, substantially as described.

In testimony of all of which I have hereunto subscribed my name.

JAMES L. LOVE.

Witnesses:

J. B. WHITAKER, Jr., T. B.- FULLER.

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