US2537438A

US2537438A - Stapling machine

Info

Publication number: US2537438A
Application number: US676484A
Authority: US
Inventors: Berger George
Original assignee: Arrow Fastener Co LLC
Current assignee: Arrow Fastener Co LLC
Priority date: 1946-06-13
Filing date: 1946-06-13
Publication date: 1951-01-09
Anticipated expiration: 1968-01-09

Description

Jan. 9, 1951 G. BERGER 2,537,438

STAPLING MAcHNE Filed June 1 5, 194e INVENTOR.

GEORGE BERGfR By /D A TTOR/VEY Patented Jan. 9, 1951 STAPLING MACHINE George Berger, New York, N. Y., assignor to Arrow Fastener Co.,` Inc., Brooklyn, N. Y., a corporation of New York Application June 13, 1946, Serial No. 676,484

3 Claims.

This invention relates to stapling machines.

An object of the invention is to provide in a stapling machine of the character described, a staple magazine having side walls, front wall and a oor member, the latterextending substantially up to said front wall and leaving only enough space therebetween for the passage of a staple.

Another object of the invention is to provide in a stapling machine of the character described, a staple magazine, a lever pivoted to the magazine and a driver in the form of a right angle member carried on the underside of the lever for driving staples one at a time from the magazine, said driver being slidably arranged for limited movement longitudinally of the lever for automatic self-alignment with the staple to be driven and with the front wall of the staple magazine.

A further object of the invention is to provide a machine of the character described in which there is a spring separate from the driver, interposed between the magazineV and the lever to swing the lever relative to the magazine, said spring being xed at one end to the lever and having laterally extending ears engaging the staple magazine.

Still another object of the invention is to provide a machine of the character described in which the staple magazine has a nose piece forming its front wall,- and having a catch comprising a tongue on one of the side walls of the magazine and a recess formed in the abutting portion of the lever for receiving said tongue, to limit rotation of the lever relative to the magazine.

Another object of the invention is to provide a stapling machine of the character described, having a two position anvil which may be swiveled to either position as desired.

Yet another object of this invention is to provide a compact and rugged stapling machine of the character described which shall be relatively inexpensive to manufacture, sure and positive in operation and practical and eicient to a high degree in use.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

`The invention accordingly consists in the features of construction, combinations of elements, and arrangement of parts which will be exemplied in the construction. hereinafter described, and

Y of which the scope of application will be indicated Fig. 3 is a plan view in section taken on line 3--3 0f Fig. l; Y

Fig. 4 is a sectional elevation taken on line 4--4 of Fig. 1;

Fig. 5 is a fragmentary plan view of the anvil on the base.

Fig. 6 is an enlarged cross-sectional view illustrating the sliding connection between the plunger and the lever.

Referring to the drawings, there is shown abase Il having an elevated floor I2 havingrecesses I3 and I4 for the reception of feet I5 and I 6 on the underside of an anvil il, the latter having staple point guide recesses I8 for spreading staple points apart and I9 for bending them to` gether in the well known manner. Said anvil has a pin 2i] extending through and secured in an aperture 2| in the anvil, and a corresponding aligned aperture in the floor I2 of the base member. The spring 22 acts between the lower head of the pin 20 and the undersurface of the floor I2, thereby yieldingly biasing the anvil downward. To change the position of the guide recesses I8 and I9, it is only necessary to press upward on the lower head of the pin 20, and to rotate the anvil by degrees, allowing the spring to again pull the feet of the anvil into their corresponding recesses to lock the anvil against pivotal movement until desired.

At the rear end of base Il are upstanding side walls 24 carrying a horizontal Ypivot pin 25. Riveted to the" floor I2 of the base II adjacent its rear end, is a strip spring 26 which is inclined upwardly and forwardly and engaging the un-Y derside of the staple magazine 21.

The staple magazine comprises a -bottom wall or oor 28, and side walls 29. Its front end is closed by a front wall 39 formed by means of a nosepiece 3I which is substantially U-shaped as seen inFig. 3 with recessed corners, its legs 32 being riveted to the lforward sides of the side walls of the staple magazine. It will be observed that the floor 2S of the staple magazine extends substantially up to the front wall 3B, with only sufcient space therebetween to form a passageway 33 for the passage therethrough of a staple '34 being pushed through said passageway.

Extending downward from the rear end of the magazine side walls are ears 35 formed with lateral openings to receive' the transverse pivot pin 25l for pivotally connecting the staple magazine to the base.

Attached to the upper side of magazine floor I member 28 is a channel shaped rail member 35 on which the staple strip `3l is mounted. Tongues 36a are depressed from the top wall 3611 of the rail member and are riveted to said floor member. The side walls 29 of the staple magazine are formed with longitudinal, inwardly pressed guide channels 29a which serve to keep the staple strip on the rail member 36.

The staples are pushed forwardly by a channel shaped slider 38 slidably mounted on member 36 and having upstanding ears 39 receiving a rod 40 which is formed with a hook 4| at its rear end adapted to engage within a notch 42 at the rear end of the staple magazine, On rod 40 is a coil compression spring 43 adapted to push the slider 38 forwardly for pressing the staples against the front wall 3D of the magazine. At the rear ends of the side walls 29 are pivot openings 44 to receive a transverse pivot pin 45 which serves to pivotally connect the lever 46 to the magazine.

The lever or cover 46 has a top wall 41 and downwardly extending side walls 48 and 49r receiving the magazine between them. At the front end of the cover 46 is a front wall 56 formed by bending the forward ends of the side walls 48 and 49 inwardly as shown.

' The side wall 49 has a recess 5! for the reception of a tongue 52 formed in the side wall 29 of the staple magazine to limit rotative movement of the lever relative to the staple magazine. The side walls of the cover lever 46 are formed with bearing openings to receive the pivot pin 45 for pivotally connecting the lever to the staple magazine.

Carried by the underside of the cover member 46 is a plunger member 53' comprising a portion 54 slidably contacting the underside of top wall 41 and a downwardly extending plunger portion 55 for contacting the inner side of front wall 3B between the recessed corners of the said front Wall of the staple magazine. The top wall 41 is formed with a through opening 41a. Member 62 is. formed with an opening 62a registering therewith, Extending through the openings 47a and 62a is a rivet 56. Portion 54 of member 53 is formedwith an elongated slot 58a through which the rivet likewise passes. The rivet 56 passes through a bushing 51. Said bushing 51 has an enlarged lower head 51a contacting the undersideof portion 54 of member 53. Said bushing also has a reduced portion 51h which is loosely received in the opening 58a. In other words, theV opening 58a is longer in a longitudinal directionY than the reduced portion 51D of the bushing 51. With such construction the plunger member 53 may be longitudinally adiusted to a limited ex tent for automatically aligning itself against the front wall 3D of the nose piece 3| and above the iirststaple, as shown in Figs. 1 and 3.

A step spring 58 has its lower end 59 formed with lateral ears 60 and bearing against the upper edges of the side walls 0i the magazine, the upper end 6l of the springv being, riveted to the underside of the. top cover 41', thus biasing. the top cover 4'1Y and the magazine apart; A knob 62 is secured to the forward portion of thetop cover 41 and may be fastened thereto by means of the same rivet 56.

It will thus be seen that there is provided a device in which the several objects of this invention are achieved, and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as variouschanges might be made in the embodiments above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting sense.

Having thus'described my invention, I claim as new and desire to secure by Letters Patent;

l. In a stapling machine, a staple magazine, a lever pivoted to said magazine, a driver comprising a right angle member, said driver having an arm contacting the underside of said lever and formed with an opening, a bushing having a reduced portionprojecting into said opening, and an enlarged portion contacting the underside of said arm, the opening in said arm being larger than the portion of the bushing which projects into said opening, whereby to permit limited sliding movement of said arm relative to the bushing, and a rivet passing through said bushing and lever for attaching said bushing to said lever.

2. In a stapling machine, a staple magazine, a lever pivoted to said magazine, a driver comprising a right angle member, said driver having an arm contacting the underside of said lever and formed with an opening, a bushing having a reduced portion projecting into said opening, and an enlarged portion contacting the underside of said arm, the'opening in said arm being larger than the portion of the bushing which projects into said opening, whereby to permit limited sliding movement of said arm relative to the bushing, a rivet passing through said bushing and lever for attaching said bushing to said lever, and a knob on said lever and attached thereto by means of said rivet.

3. In a stapling machine, a staple magazine, a lever pivoted to said magazine, a driver comprising a right angle member, said driver having an arm contacting the underside of said lever and formed with an opening, a bushing having a reduced portion projecting into said opening, and

an enlarged portion contacting the underside of said arm, the opening in said arm being larger than the portion of the bushing which projectsinto said opening, Whereby'to permit limited sliding movement of said arm relative to the bushing, a rivet passing through said 'bushing and lever for attaching said bushing to said lever, and a knob on said lever and attached thereto by means of said rivet, said lever being formed with a recess below saidknob, a blade spring. contacting the underside of the recessed portion of the lever, a rivet passing through said recessed portion and spring for attaching said spring to said lever, said spring having a free end contacting said staple magazine.

GEORGE BERGER.`

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTSv Number Name vDate 1,688,879 Polzer Oct. 23, 1928 1,943,661 Ellacott Jan. 16, 1934 1,983,397 Pelzer Dec. 4, 1934 2,112,926 Pankonin Apr. 5, 1938 2,181,387 Weber Nov. 28, 1939 2,247,292 Eps June 24, 1941 2,272,773 Maynard Feb. 10, 1942 2,312,142 Abrams Feb. 23, 1943 2,314,847 Polzer Mar, 25, 1943 2,354,760 Lindstrom Aug. 1, 1944