US484281A

US484281A - Signments

Info

Publication number: US484281A
Authority: US
Publication date: 1892-10-11
Anticipated expiration: 1909-10-11

Description

(No Model.) 2 Sheets-Sheet 1.

F. L. BAKER.

PAPER BAG MAGHINB.

110. 484,281. Patented 001. 11, 1892.

dm il 1722 4,?

(No Model.) 2 Sheets-Sheet 2;

P. L. BAKER. PAPER BAG MACHINE.

No. 484,281. Patented Oct. 11, 1892.

o-urnm, wasnmmu, a. n4

UNITED STATES PATENT OFFICE.

FRANK L. BAKER, OF WILMINGTON, DELAWARE, ASSIGNOR, BY MESNE AS- SIGNMENTS, TO THE DIAMOND PAPER BAG COMPANY, OF SAME PLACE.

PAPER-BAG MACHINE.

SPECIFICATION forming part of Letters Patent N0.'484,281, dated October 11 1892.

Application filed September 8, 1891. Serial No. 405,070. (No model.)

To 00% whom it may concern.-

Be it known that I, FRANK L. BAKER, a citizen of the United States, residing at Wilmington, in the county of New Castle and State of Delaware, have invented certain new and useful Improvements in Paper-Bag Machines, of which the following is a specification.

My invention relates to the manufacture of paper bags, and more especially to machines of the character shown in Patent No. 415,950, granted November 26, 1889, which are adapted to be used in the manufacture of either fiat or square bottom bags having pasted, tucked, and folded bottoms.

It has for its object to improve the construction and arrangement and mode of op- 'eration of such machines to enable them more perfectly and satisfactorily to carry out the various operations necessary for making a complete bag.

My invention consists in a certain construction and arrangement of parts of the machine, whereby the folding and pasting of the bagbottom may be carried out, as will be more specifically pointed out hereinafter, and for which I made application for patent in Canada on the 18th day of November, 1891, Serial No. 58,543.

Referring. to the accompanying drawings, in which I have shown the preferred embodiment of my invention, Figure 1 is a longitudinal vertical section of the machine. Fig. 2 is a plan view of the same. Fig. 3 is a detached view of the gripping-rolls and pasting devices. Fig. 4 is an enlarged view of one of the rolls and the tucking-blade. Fig. 5 is a sectional view of the same.

In the accompanying drawings I have illustrated sufficient of a paper-bag machine to clearly disclose my invention, and in which 21 represents the feed-rolls for feeding the tube over the usual former, and 20 a rotary cutting-knife for severing the tube into baglengths, operating in connection with the ordinary stationary knife, and 16 and 17 are the folding-rollers for forming the bottom. Between the cutting-blade and the bite of the rollers is a funnel-shaped guide 14, and a folding-blade 12 is mounted in rock-arms 15 and is adapted to be operated substantially as set forth in the patent above referred to.

Mounted on the frame of the machine is a paste-box 4, in which moves a vertically-reciprocating paster 6, it being operated by the rock-arm 2, which in turn is vibrated by the arm 3, taking into the groove of a cam 1, and motion is imparted to this cam through a train of gears, which need not herein be specifically described.

One of my improvements relates to the means of controlling the supply of paste from the paste-box 4 by means of the reciprocating blade 6. This blade is arranged parallel to the front side of the box, the lower portion bearing on a bar 13, being held in contact therewith by a spring 7. Passing through the bottom of the box is a doctor or scraper blade 9, the ends of which are prolonged so as to extend to the front at each side of the paste-blade, and this doctor is normally under the stress of a spring or springs 8, secured to the paste-box, so that it is held in proper position with relation to the vertically-moving paste-blade. In order to regulate the amount of paste delivered by the blade, I provide means for adjusting the doctor, and in the present instance I have shown the screwrods 5, mounted on the front side of the pasteblade and having conical ends which bear upon the projecting fingers or extensions of the doctor 9, and it will be seen that by adjusting these screw-rods the space between the doctor and the operating-surface of the paste-blade may be nicely and accurately adjusted, so that the precise amount of paste will be delivered by the blade.

Another and important feature of my invention relates to the manner of applying paste to the folded end of the bag-blank, and in carrying out this feature of my invention I provide a movable paste-bar 10, which is arranged above and practically between the

rolls

16 and 17 and slides in suitable guides in the frame of the machine, being moved forward by a cam or projection 11 or other 5 equivalent means, and being returned to its normal position by a spring or springs 18. This paste-bar has an inclined top surface, and as the tube is fed past the cutters and over the roll 16 its end strikes this inclined surface of the paste-bar and rides upon it, and when it has reached the proper position the paste blade 6 descends and the forward end of the tube is creased and the end bent up against the paste-blade to receive the paste. At the moment the paste-blade reaches its lowermost position, or, if preferred, just before it reaches this position, the paste-bar is forced forward by the cam 11,so as to grasp the end of the tube between its forward surface and the surface of the paste-blade and to press the end of the tube firmly against the blade. The cams are so shaped that these operations will be properly timed, and, preferably, there will be a dwell, the paste-blade beingheld in its lowermost position and "-the paste bar clamping the end of the tube against it for? a very important feature, as the pressure of the bag-bottom against the pasteblade i-nsures an even and smooth distribution of the paste, as well as acomplete adhe'renee of the paste to the end of the tube. Moreover, this combined action of thepaste-blade and pastebar performs'another important function in that it firmly holds the end of -the advancing 'tube stationary u'n'til sufficient of the tube l hasbeen fed forward by the feed-rollers to I allow the requisite slack to insure a proper severance of the bag-lengths'from the tube by the rotating knife and without danger of the bag being distorted or displacedfso th'atl'the bottom will not be evenly made. Whenthe bag-length is severed, the foldingortucking; blade 12 is brought into operation to tuck the bottom ofthe bag-length into the 'bite'of'thef' rollers 16 17, and it willbese'enthat the tuckerit blade does not have to crease the blank for; the bottom fold, as this is alreadyperformed f by the paste-blade and paste-bar (ac-operating therewith, the tucker-blade merelyl operating i to push the bottom into the bite of therollers. Heretofore this folding or tucker blade 1 has been "made with a straight edge, and it has required a great nicety of adjustment of the parts 'to prevent the tucker-blade being} caught in the bite of the rollers, and th ereby; impeding the operation, especially when'the machineis driven at a high rate of speed. In order to avoid this danger,-I provide the; tucker-blade 12 with cut-away portions, so as l to leave the projections 25 (best shown in Fig. 4) on its tucking-edge, and these .pro-

jections may be of sufficient n-umberto prop-. e'rly insert the bag-bottom into the bite of the l rollers without danger of tearing the paper, and as the crease has already been formed by thefolding-blade I find that thet-ucker blade made as described performs its functions thoroughly and satisfactorily. As a further safeguard to .prevent any accidental sticking of the tucker-blade between the rollers, Icu't} away apor'tion of the rollers, either or both,

at points corresponding with the projections 25. Thus in Figsmt and 5 I have shown the roller 16 as having cut-away orrecessed portions 24, corresponding with "the projection 25 on the tucker-blade, and thereby I prevent any possibility of the tucker-blade sticking or being caught in the bite of the rolls.

Such being the construction and arrangement of the devices, their operation will be fully understood and need not be set forth in detail further than to say that the movements of the different parts of the machine are so timed that the paste-blades preferably move downward at the same speed the tube is fed over the roll 16 by the feed-rolls, and the end of the tube is held between the paste-blade and paste-bar a time sufficient to allow the severance of the bag-blank from the paper tube. As soon as the paste-blade moves upward the tucker-blade operates to tuck the end of the bag-blank into thebite of the-rollers.

While I have described the paste-blade as reciprocating in a vertical line and the;pastebar moving against the blade, it is evident that-I can make the paste-bar stationary and the bladeinove against its-forward face-and accomplish the *same results in substantially the same manner. 'Otherfvariations in the details of "construction and operation of devices will readily suggest-themselves -to those skilledyin the art, as it is evidentthat the details of construction and arrangement set forth may be varied without departing from the general principles of my invention. The featuresbf invention'may be adapted to vai'ious 'stylesand forms of machines other than that indicated in the drawings and the method or steps of my process of forming the bottoms of paperbags be fully carried out.

What I claim is 1. In apaper-bag machine-the combination of a apaste-applier, and a -p'resser wherebythe endof the bagis creased, supplied with distributed paste and held during the slacking and severingof the blank from the web,with ineans for completing thefold of the creased and .pasted end portion, substantially 'as described.

2. The combination, with the paste-blade carryingpaste o'n one of its "sides, of a pastebar between which and the paste-blade the paper is-grasped, substantially as described.

3. The combination, with the paste-bladecarnying paste on oneside, of the paste-bar between which bar and blade the paper is grasped, one of the parts'oein-g movable with respect to the other, substantially as debe t i 4. The combination, with thereciprocating paste-blade carrying:pafste on-one of its sides, of the movable bar adapted "to pressthepaper against the -paste blade,'substantially as described. U

5, The combination, with the-feed-rolls't-he guide, and cutting-blades; ofapaste-barhavin-g an inclined-surface and a reciprocating pasteblade, the arrangement being suchth at the paper is fed over the inclined surfaceof the oar'and is pressed against the face fof the paste-blade, substantially as described. A

6. The combination, with the feed-rolls,

guide, and cutters, of the paste-bar, a reciprocating paste-blade, and an operative mechanism for said bar and blades, the arrangement being such that the paper is grasped between the bar and blade and held while the baglength is being severed, substantially as described. v

7. The combination, with the rolls, of a reciprocating paste-blade, a paste-bar co-operating with the paste-blade to. grasp and crease the end of the tube and apply paste thereto, and a tucker for tucking the creased portion into the bite of the roller, substantially as described.

8. The combination, with the rolls having recesses 24, of a tucking-blade having projections corresponding with said recesses, substantially as described.

- screw-rods having conioal ends, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

w FRANK L. BAKER. Witnesses:

THOMAS REARDON,

J NO. J. SATTERTHWAIT.