US2380785A

US2380785A - Stapling machine

Info

Publication number: US2380785A
Application number: US517311A
Authority: US
Inventors: Richard A Percoco
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-01-07
Filing date: 1944-01-07
Publication date: 1945-07-31
Anticipated expiration: 1962-07-31

Description

July 31, 1945.

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R mv N U m+ H 5 O INVENTOR 21 W MW ATTORNEY Patented July 31, 1945 UNITED STATES PATENT OFFICE 2,380,785 STAPLING MACHINE Richard Percoco, Mamaroneck, N. Y.

Application January 7, 1944, Serial No. 517,311

7 Claims.

My invention relates to stapling machines and has particular references to machines for stitching together paper and similar materials by means of wire staples.

My invention has for" its object to provide a stapling machine of a simple and durable construction, reliable in operation, and which will be suitable for hard service and rough treatment.

Another object of my invention is to provide means to insure accurate and satisfactory driving of the staples regardless of the condition ofthis purpose a part or block which is normallypositioned at the front end for holding the last staple directly under the driving bar. The block can be moved outward and upward by a single movement of a front slide, thereby exposing the staples.

Another object of my invention is to provide means to release spring pressure on the staples in the staple magazine when it is desired to open the front end of the machine. I provide for this purpose a slide in the magazine with a springoperated hook, which automatically engages a shoulder at the rear of the magazine when the slide is moved back, the hook being easily releasable by pressing it downward.

Another object of my invention is to provide means to limit the movements of the main plunger in such a manner that the pressure is distributed between the upper and lower ends of the plunger thereby preventing bending of the plunger when it is driven very hard.

Another object of my invention is to provide means to adjust the machine for staples of different thickness, with the minimum of changes or replacements.

Still another object of my invention is to provide means for a simple kCODVGI'SiOII of my machine for foot power operation.

My invention- Fig. 1 is a sectional elevational view of my machine;

Fig. 2 is atop plan view of the same partly in section;

Fig. 3 is a front view of the machine;

Fig. 4. is a detail view of a locking device;' Fig. 5 is a front view of a staple closing Fig. 6 is a side view of the same; Fig. 7 is an elevational view {of the machine, showing the closing fork in a raised position;

fork;

Fig. 8 is a side view of a staple holding party Fig. 9 is a front view of the same;

Fig. 10 is a developed view of a latch for a staple slide. 5

Fig. 11; is a detail sectional view taken on the line ll-H of Fig. 3. v

My stapling machine comprises a bar I shaped to support staples 2. Spacers 3 are attached to the sides of the bar of a thickness, corresponding to the thickness of the staples, guiding strips 4 being attached to the spacers, forming a magazine for the staples. The strips are bent or folded at the top over the bar I, leaving a clearance l for a pin 8 of a staple pusher 9. The head of the pin or bolt ii is made in the shape of a hook, engaging arounded middle portion of a locking member It, made of sheet metal and shown in a developed or flattened form in Fig. 10. The locking member is provided with a tongue II which is bent inwardly, passing through a slot l2 and forming a handle for the member. The wide portion of the locking member is provided with a hook l3for engaging the rear edges of the strips 4 whenit is desired to hold the staple pusher in an inoperative position. The locking member is released by depressing the tongue i I, thereby rotating the member in its bearing in the hook 8 and raising the hook I 3 from the edges of the strips. 7

The staple pusher 9 is urged forward by a clock spring l5 mounted on a pin it passing through walls ll, l8 of a head or box, generally indicated are therefore prevented from moving forward by angular slots 26 in a slide 21, shown in detail in Figs. 6 and 11 since the outward movement, as shown in Fig. 1, can take place only as a part of the downward movement. The slide 21 is made of sheet metal bent in the form of a U-shaped yoke, placed between the walls I7, I8. The slide is provided with enlarged portions 3| for the'slots 26 and with a lip 3| for theslots 25 and with a lip 32 at the front for manually moving the slide up or down. Flanges i3 at the front edges of to pedals.

the slide slidably engage the edges of the walls l1, 18. The slide is guided by a pin 34 passing through elongated slots 35 in the sides of the slide and fastened in the walls l1, IS. The upper ends of the sides of the slide are provided with curved projections 31, frictionally engaging the walls [1, l8 when the slide is in its operative position as shown in Figs. 1 and 3, and extending beyond the upper edges of the walls when the slide is raised into an inoperative position as shown in Fig. 7.

For loading the staples into the magazine, the slide is raised upward by pressing on the lip 32. The lower edges of the slots 25, bearing against the pins 24, will force the plates 23 outward until the pins reach the ends of the slots, bringing the plates in front of the walls l1, I8. With the further upward movement of the slide, the plates will be also raised upward along the front edges of the walls into an inoperative position as shown in Fig. 7. The slide is held in this position by the projections 21 engaging the upper edges of the .walls l1, 18.

A staple driving bar 45 is slidably supported beplunger is moved downward but is caught if the plunger is released, preventing the plunger from returning into its upper inoperative position. Upon completion of the downward stroke of the plunger, the lug 1| passes under the bar 54 and the latter is moved into its original position by the spring 89. The lug then slides over the smooth side of the bar when the plunger is moved upward, depressing the bar to one side against the pressure of the spring 59. The lug 11 passes above the bar 64, releasing the latter to be returned into its original position by the spring 69.

It will be understood that various features and principles of each of the embodiments of the invention above described or referred to may be utilized or substituted in the other embodiment.

tween the walls l1, l8, slidably fitted in corresponding slots in the walls, The upper end of the bar 45 is loosely supported on a pin 45, extending from a plunger 41. The plunger slides between liners 48 at the sides of the walls I1, I8, the front ends of. the liners being bent over, forming flanges 50 for guiding the front side of the plunger. The rear side of the plunger is guided by additional liners 5|. The plunger has a bore 52 for a spring 53, supportedon a pin 54 extending from a crossbar 55 fastened to the walls l1, l8. The down- While the invention has been described in detail with respect to certain particular preferred examples, it will beunderstood by those skilled in the art after understanding the invention, that various changes and further modifications may be made without departing from the spirit and scope of the invention, and it is intended therefore in the appended claims to cover all such changes and modifications.

What is claimed as new and desired to be secured by Letters Patent is: Y 4

1.- A stapling machine comprising a box; a plunger slidably supported in the box; means to guide the plunger; a pin fitted transversely into the upper portion of the plunger; a staple driver having a hole at the top engaging the one end of the pin; means to feed staples under the staple driver; a transverse member in the box for abutward movement of the plunger is limited by the rear end of the pin engaging a pin 51 fitted between the walls l1, IS. A short pin 58 is fitted in the lower portion of the plunger and limits its upward movement by engaging the pin 51. A second pin 59 may be provided between the walls I1, 18 as an added stopping means for the pin.

It is important that the driving bar should The plunger in my machine does not touchthe bottom bar and cannot damage the latter, the shocks being taken by

replaceable pins

45, 58, 51, 59.

A head-50 may be provided on top of the plunger for manual operation, also a hole 5| fora pin 62, shown in dotted lines in Fig. 3, for connection A locking bar 63 is provided to prevent return movement of the plunger before its operating stroke is completed. The bar 53 is made of a metal strip, bent at right angles along its length and slidably mounted on pins 65, 85 supported in the walls I1, l8. The ends of the bar are curved at 61, 88, forming convex portions, resting against the inner sides of the walls 11, I8. A spring 69 urges the upper end of the bar against the wall. Teeth 16 are provided in the other side of the bar for 8. lug 11, extending from the pin 58.

The lug 1| slides over the teeth 10 when the ting the other end of the pin at the end of the operating stroke of the plunger; and a second pin extending from the side of the plunger for engaging the transverse member at the end of the inoperating stroke of the plunger.

2. A stapling machine comprising a box; a plunger slidably supported in the box; means to guide the plunger; a staple driver supported on the plunger, the box having means to guide the staple driver; means to feed staples under. the staple driver; a slide slidably supported in front of the staple driver; a pin supported in the box passing through an elongated slot in the slide; a member at the lower end of the slide for abutting the staples for retaining the last staple under the staple driver; and a lug on the slide for manually moving the slide upward for raising the staple retaining means above the staples.

3. A stapling machine comprising a box; a plunger slidably supported in the box; means to guide the plunger; a staple driver supported on theplunger, the box having means to guide the staple driver; means to feed staples under the staple driver; a slide in front of the staple driver; means to slidably support the slide at the walls of the box; a member movably supported at the lower end of the slide abutting the outermost staple in its operative position under the staple driver when the slide is in an 1 operative position; and means at the slide for moving, the member outward inresponse to the slide being raised upward thereby exposing the .staples.

4. A stapling machine comprising a box; a plunger slidably supported in thebox; means to guide the plunger; a staple driver supported on the plunger, the box having means to guide the staple driver; means to feed staples under the staple driver; a slide in front of the staple driver; means to ,slidably support the slide at the walls of the box, means on the slide for manually moving the slide upward; a member movably supported at the lower end of the slide for abutting the staples under the staple driver; means to prevent the staple abutting member from moving downward and outward and means to render the staple abutting member operative for outward and downward movement in response to the slide being raised for exposing the staples.

5. A stapling machine comprising a box; a plunger slidably supported in the box; means to guide the plunger; a staple driver supported on the plunger, the box having means to guide the staple driver; means to feed staples under the staple driver; a slide in front of the staple driver; means to slidably support the slide at the walls of the box; means on the slide for manually moving the slide upward; a member movably supported at the lower end of the slide for abutting the staples under the staple driver; and camshaped portions at the lower end of the slide for moving the member outward when the slide with the member is raised.

6. A stapling machine comprising a box; a plunger slidably supported in the box; means to guide the plunger; a staple driver supported on the plunger, the box having means to guide the staple driver; means to feed staples under the staple driver; a slide in front of the staple driver;

means to slidably support the slide at the walls of the box, a lug on the slide for manually moving the slide; a member movably supported at the lower end of the slide for abutting the staples under the staple driver; means on the slide to move the member outward and upward in response to the slide being raised for exposing the staples; and means to yieldably retain the slide in the raised position.

7. A stapling machine comprising a box; a plunger slidably supported in the box; means to guide the plunger; a staple driver sup-ported on the plunger, the box having means to guide the staple driver; means to feed staples under the staple driver; a slide in front of the staple driver; means to slidably support the slide at the walls of the box, means on the slide for manually moving the slide upward; a member movably supported at the lower end of the slide forming a stop for the staples under the staple driver; the member being formed of two bars connected together by pins; the slide having inclined slots for the pins with cam-shaped edges for moving the member outward when the slide is raised thereby exposing the staples.

RICHARD A. PERCOCO.