US1348161A - Feeding mechanism for stapling-machines - Google Patents

Description

J. C. DOZIER.

FEEDING MECHANISM FOR STAPLING MACHINES.

APPLICATION FILED SEPT. e, 1919.

Patented Aug. 3, 1920.

3 SHEETS-SHEET J. C. DOZIER. FEEDlNG MECHANISM FOR STAPLING MACHINES.

APPLICATION FILED SEPT. 6; 1919.

Patented Aug. 3, 1920.

3 SHEETS-SHEET 2.

J. C. DOZIER. FEEDING MECHANISM FOR STAPLING MACHINE-S.

APPLICATION FILED SEPT. 6, 1919.

"1 348, 1 6 1 Patented Aug. 3, 1920.

3 SHEETSSHEET 3.

UNITED STATES.

C. DOZIER, BATON ROUGEfLOUISIANA.

FEEDING MECHANISM FOR STAPLING-MACHINES/ Specification of Letters Patent.

Patented Aug. 3, 1920.

Application filed September 6, 1919. Serial No. 322,152.

T 0 all whom it may concern:

Be it known that I, JAMES C. DOZIER, a citizen of the United States, residing at Baton Rouge, in the county of Baton Rouge and State of Louisiana, have invented cer-. tain new and useful Improvements in Feeding Mechanism for Stapling-Machines, of which the following is a specification.

This invention relates to stapling machines, and more particularly to devices attached thereto andada-pted to automatically feed the stock to the stapler hammers.

One of the objects of the invention is the provision of means, attachable to the machine proper, whereby the stock is automatically given a step-by-stepmovement toward and under the hammers, thereby dispensing with the necessity for the operator to handle the stock for this purpose.

Another object of the invention is the production of a device of this nature which may readily be attached to the standard machines now in use, and which, in operation, will not only automatically assure this step-bystep movement heretofore referred to but will be capable of easy adjustment to regu late said'steps.

Still another object of the invention is the production of means preventing too great a forward movement of the stock, under the impulse of the improved mechanism. Other objects will be apparent from the following specifications and claims: In the drawings forming a part of this specification,

Figure 1 is a rear plan view of a wire stapling machine to which my improvement 'is attached,

Fig. 2 is a detailed perspective view of that portion of the machine to which the improvement is attached, I

Fig. 3 is atop plan viewof a form used for holding the stock as it is fed to'the machine,

Figr is a plan view of the stock after it passes through the machine and leaves the form,

Fig. 5 is a detail view of the operating pawl, t

Fig. 6' is a modified form of the invention, and

Fig. 7 is a fragmentary plan view of an enlarged form for carrying the stock.

7 Now referring specifically to' the drawings, Fig. 1 represents aview of a wire stapling machine, and I have here shown said machine adapted for use in stapling the units which are thereafter utilized to make up shipping boxes or crates, either wire bound or otherwise.

The machine here shown comprises the standard A, provided with a main operating shaft B,having an attached driving wheel G to which power is applied through a belt D. The shaft B is provided with a gear E, meshing with a gear F secured to another shaft G. Eccentrics H, H, are mounted on the shaft G," and are pivotally connected to rods I, I, extendin upwardly through fixed sleeves J, J, (see ig. 2) supported by the standards A, A, and carrying a cross head K. Stapling hammers L, L, are mounted on a transverse beam M positioned beneatlf the cross head K, said hammers being suitably connected to and operable by the reciprocations of said cross head. A table N is mounted beneath the hammers L, L, and serves as a support for-the stock passing under the hammers, being provided with suitable guideways for directing the stock thereto.

It will be evident that rotation of the shaft B will actuate the shaft G and cause the eccentrics H, H, to impart a rising and falling movementv to the hammers L, L,

through the rods I, I, and the cross headK,

wire being simultaneously fed to the hammers from the spools O, O. Since the machine so far described is old in the art, and forms no part of my invention, except in combination, it is believed that further description thereof is unnecessary.

Ordinarily, when assembling the units of knockdown boxes, a properly sized form is used, and the units commonly comprise two comparatively rigid beads or strips 1, (Fig. 4) and a plurality of thin veneerpanels 2. The panels may be placed in contact, to form a closed unit, or may be separated to form what may be termed a crate-like structure. The disposition of the panels of course depends upon'the nature of the boxes to be produced.

In assembling the units of boxes of this nature, great difficulty has heretofore arisen because it has usuallybeen necessary for the stock tobe laid in the form and the latter manually pushed by the operator under the hammers. The objection to this method has been that the operator did not always space the staples properly, and the result has 20 r V atory to assembly, the strips 1, 1, are laid always been many defective units and unsightly work. It is the purpose of my invention to overcome this difficulty.

In Fig. 3 I have shown a new form which is designed to receive the strips 1 and the veneer 2. This form comprises side members 3, 3 and end members 4, 4, the end members being connected by a panel 5 which is spaced from the side members, but parallel thereto, as clearly shown in said figure. A plurality of transverse, upstanding spacing members 6 are mounted on the panel 5, and extend to a point just short of the edge of said panel. Secured to said panel, adjacent at least one of said members 6, and at either end thereof, are two blocks 7, 7, provided, with spring fingers 8, 8, which extend past the end of the member 6 and are formed with curved extensions presenting convex outer terminals 9, 9. In actual operation, preparbetweenthe fingers 8, 8, and the inner edge of the side members 3, 3, and the terminals 9, 9 bear against the strips and press them against the members 3, 3. The veneer panels are then laid transversely'over the strips 1, being separated by the members 6, and the unit is then passed through the machine and stitched. :It is to be noted that the blocks 7 and the fingers 8are not of a height sufiicient to contact the panels 2, during the aforesaid operation. I

In order to assure the automatic operation hereinafter referred to, I provide a row of ratchet teeth '10, in one side of the form, as clearly shown in the drawings. These teeth may of course be out directly into the material of the form, or may be attached therethat Ihave provided a support 11 which is to asdesired. V

Now referring to Fig. 2, it'will be noted rigidly fixed in position, and preferably slightly curved away fromthe cross-head K. A rocker arm is pivoted at 12 to the support 11, said arm being provided with. a substantially verticalleg 1-3 and with ahorizontally extending leg 14. V

Fixed to the cross-head, in any suitable manner, is a block 15, provided with a vertically elongated slot 16 adapted to'receive the reduced end portion 17 of the leg 14. Pivotally connected at 18 to the lower end of the leg 11 is a block 19. A pawl 20 is adjustably connected to the block 19, as shown-in Fig. 2. The pawl 20 is slotted to receive the bolts 21 provided with thumbscrews 22, by which constructionthe effective length of the pawl20 may be varied, as will be understood. A spring 23 is mounted on the leg 13 and constantly exerts pressure upon the block 20.

From the construction as explained, the operation of the device should be clearly understood. The form, carrying the assembled strips 1 and veneer panels 2, is

mounted in the-guideways on the table, the pawl 20 resting in one of the notches formed by the teeth- 10. Each upward reciprocation of the cross-head K, causes the lower wall of the slot 16 to contact the end 17 and raise the leg 14. This movement will obviously rock the leg 13. inwardly and exert a push upon the form, through the'engagement of the pawl "20 with the teeth 10. The downward movement of the cross-head K will cause a depression of the leg 14 and consequent retraction of the leg 13,drawing the pawl 20 backwardly over the ratchet teeth 10. By properly sizing the teeth 10, and adjusting the pawl 20, any desired arrangement of the stapling points may be effected.

Moreover, it is to be noted that, since therise of the cross-head advances'the form, and, since the hammers are carried by the crosshead, the elongated slot 16 permits of enough lost motion to assure that the hammers will be lifted clear of the stock before the pawl begins to advance the form, and this'is an important feature of my construction. Fixed to avconvenient stationary point ofthe machine is a spring pressure-foot 24, the lower end of which is adapted for pressing engagement with the top surface ofa side member 3, of the form. This pressure-foot serves to retard the movement of the form,

and operates asabrake to check the mo mentum of said form, under the impulse given by the pawl. As soon as the pawl discontinues its forward push, the pressure-foot causes the form. to stopimmediately. Z

Figs. 6 and 7 show a modificationof the invention, which modification would be ratchet teeth 10. To accomplish this purpose I provide two supports 11, 11, one on each side of the table. Fixed to the rocker supports 11, 11. An arm 26 is fixed to the I arm 13 is a shaft 25, having bearings in the 6 right end of the shaft 12, in the construction shown in Fig. 6, and, at its lower end, carries a block 19, and pawl 20, similar to the arrangement shown in Fig. 2. The arms 13 and 26 may be fixed'to theshaft 25, by bolts 27, 27, as shown, or otherwise, and it will be understood that, as thecrosshead' K reciprocates, it will, through the leg 14, rock theshaft 25, actuating the arms 13 and 26 and'exerting apush or pull upon each of the pawls 20 operating against the teeth -10 on each side of the form." This embodiment of the invention exerts a push upon both sides of the form, and prevents buckling thereof in its guideways. Furthermore, in order to accommodate wide forms of varying size, it is obvious that the right hand bolt 27 may be loosened and the arm 26 moved longitudinally of the shaft and thereafter again fixed thereto in such a position that its attached pawl may properly engage the associated teeth 10.

Various modifications of the invention may be suggested to those skilled in the art, but I desire to secure by Letters Patent all such embodiments as fall fairly within the scope of the appended claims.

I claim:

1. The combination with a stapling machine provided with a reciprocating crosshead, stapling hammers, a table under the hammers and a stock-carrying form movable relatively of the table, of means whereby reciprocation of the cross-head may move said form, said means comprising a pivoted member in operative contact with the form and adapted for contact by the crosshead after the cross head has started its upward movement so that a movement of the form will take place after the hammers have been lifted therefrom.

The combination with a stapling machine provided with a reciprocating member, reciprocating stapling hammers operatively connected thereto, means for feeding stock to the hammers, comprising a. racked form carrying the stock and movable under the hammers, a block carried by said reciprocating member and-provided with a slot elongated in the direction of the reciprocations of said member, a rocker arm, a pawl pivotally connected to one end of said arm and engaging the teeth on the racked form, the other end of said arm extending into said slot and said other end of the arm having a width less than the length of said slot so as to provide a lost-motion device, substantially as described.

ture.

JAMES C. DOZIER.

In testimony whereof I afiix my signa-

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