US2625681A

US2625681A - Table type stapler

Info

Publication number: US2625681A
Application number: US111413A
Authority: US
Inventors: Frank S Boroughs
Original assignee: Arrow Fastener Co LLC
Current assignee: Arrow Fastener Co LLC
Priority date: 1949-08-20
Filing date: 1949-08-20
Publication date: 1953-01-20
Anticipated expiration: 1970-01-20

Description

Jan. 20, 1953 F. s. BoRouGHs TABLE TYPE STAPLER 5 Sheets-Sheet l Filed Aug. 20, 1949 m @l www@ INVENTOR. frank f 50m BY N .mi s@ Jan. 20, 1953 F. s. BoRouc-.Hs

TABLE TYPE STAPLER 3 Sheets-Sheet 2 Filed Aug. 20, 1949 Jan. 20, 1953 F. s. BomuGl-xs TABLE TYPE STAFLER 3 Sheets-Sheet 3 Filed Aug. 20, 1949 s. R 1N WL/ wa/ N N W DOA Mf/ H wry w@ mma FW Patented Jan. 20, 1953 VTABLE TYPE s'rArLER.

Frank S. Boroughs, New York, N. Y., assignor to Arrow Fastener Co., Inc., Brooklyn, N. Y., a corporation of New York Application August 2o, 1949, serial No. 111,413

2 Claims. (Cl. 1 3) This invention relates to table staplers.

An object of this invention is to provide a stapler comprising a base, staple magazine pivoted to one end of the base, and cover pivoted at its rear end to the rear end of the staple magazine and swingable relative to the magazine and the base, means on the cover to drive staples from the magazine against an anvil on the base, and spring operated latch means to locate the degree of angular movement of the cover relative to the staple magazine, said latch means being releasable to permit the cover to be swung upwardly away from the staplemagazine so as to uncover the top of the staple magazine to permit servicing thereof.

Another object of this invention is to provide in a stapler of the character described, a cover, an angle shaped member attached to the underside of the cover and having a downwardly extending linger, and a driver blade removably mounted on said nger, and adapted to drive staples from the staple magazine, said blade being attached to the said linger without any screws, rivets, welding or any other permanent attaching means.

Yet a further object of this invention is to provide in a stapler of the character described, a staple magazine pivoted at its rear end to the rear end of the base, and spring bumper or shock absorber means to cushion downward movement of the magazine toward the base and to lift the magazine relative to the base when downward pressure is removed from the cover of the stapler.

Yet another object of this invention is to provide a table type stapler of the character described comprising a staple magazine comprising a body having upwardly extending side walls,l a staple guide within said body, a pusher slidable on said body and disposed within said body, a push rod slidab-ly engaging the pusher, a backv member riveted to the rear end of the push rod, a latch having rocking engagement with the back member and formed with a tongue contacting the inner surface of the back member, said tongue having an opening through which the push rodl passes, a coil compression spring on the push rod interposed between the tongue and the pusher, and said latch having means to engage appropriate hooks in the side walls of said body for retaining the push rod on the staple magazine, said push rod, back member and rocking latch being movable forwardly to disengage the latchv from the hooks on the side walls of the bodl7 to permit removal of the pusher and push rod from the stapler.

A still further obj ect of this invention is to pro vide in a stapler of the character described a cover pivoted to the staple magazine, a holder for'k a driver blade riveted to thetop wall of the cover, a spring for causing relative movement between the staple magazine and cover, likewise riveted to the top wall of the cover and a plate weldedy to the upper surface of the-top wall ofthe cover and being formed with an upwardly recessed portion to receive the heads of therivets which rivetv blade holder and spring tothezcover.

Yet another object of this invention is to prog.

vide. a deviceof the character describedin which the back member ofthe pusher mechanismV has rails slidably received in tracks formed in side walls of the staple magazine body for guiding the,

back member relative to the staple magazine. i

Yet a further object of this inventionis to provide a small, compact, rugged table type stapler of the character described, which shall be smooth and positive in operation, easy to assemble and clean and service, and which shall yet be practical.v

andeiicient to aghigh degree in use. 1 Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly vconsists in the features of construction, combinations ofV elements,

and arrangement of parts, which will be exemplied in the construction hereinafter described, and of which the scope of invention will be `indicatedin the following claims.

In the accompanying drawings in whichfis diments ofnthis` shown various. illustrative embo invention,

embodying the invention;

Fig. 2 is a longitudinal cross sectional view thereof Fig. 3 is a top plan view of the stapler with parts broken away and in cross section;

Fig. 4 is a cross sectional view taken on line Fig. 8 is a crosssectional `Vview ltalrenonliriev Fig, 9 is a rearelevationalnview of the staple device;

the pushei` mechanism; l

Fig. 10 is apersp'ect'ive view `of the latch for T ortica-fj j Fig. 1 is a side elevational view of thestaplerV Fig. l1 is a perspective view of the back member forming part of the pusher mechanism;

Fig. 12 is a cross sectional view taken on line |2|2 of Fig. 2;

Fig. 13 is a cross sectional view taken on line |3|3 of Fig. 12;

Fig. 14 is a front view of the driver blade holder; and

Fig. 15 is a partial front view of the driver blade.

Referring now in detail to the drawing, I designates a stapler embodying the invention. The same comprises generally a base Il, a staple magazine I2 pivoted thereto and a cover I3 pivoted to the staple magazine.

The base Il comprises a member I4 made of sheet metal and having a top wall |5 from which extend downwardly, rearwardly converging flanges I6 interconnected by a front semi-circular flange I1. Flanges I6 terminate forwardly of the rear end of the base, as at |8. At the rear end of the wall I5 is a rearwardly extending tongue I9 from which extend upwardly a pair of parallel side walls or flanges 20. Flanges 20 are formed with aligned openings 2| for the purpose hereinafter appearing.

The tongue |9 is formed with a central opening 2| (Fig. 2) disposed between the side flanges 20 for the purpose hereinafter appearing.

The side flanges 20 extend rearwardly beyond the tongue |8 as shown in Fig. 2 of the drawing. The flanges 20 may have upper, downwardly and rearwardly curved edges 22. The top wall I5 is formed, rearwardly of its front edge, with a depressed portion 23 to receive an anvil 24, of usual construction, fixed thereto in any suitable manner. The tongue I9 may also be formed with downwardly depressed rib 25 to stiffen the tongue.

Extending through the opening 2| in the tongue I9 is a pin 26 having a portion 21 of enlarged diameter contacting the upper surface of the tongue I9. Extending downwardly from portion 21 is a portion 28 of reduced diameter, which passes through the opening 2|, and the same has a rivet head 29 at its lower end. The portion 21 has a rivet head 30 at its upper end.

Contacting the underside of the tongue I9 is a rubber pad 3| extending below the lower edges of the flanges I6, I1. The pad 3| is formed at its underside with a central recess 32 and with a through opening 33, centralized with respect to the recess 32 and registering with the opening 2 I. The portion 28 passes through the opening 33. Within the recess 32 is a washer 34 contacting the undersurface of said recess and held in place by the rivet head 29. Mounted on top of the tongue I9 is a spiral coil spring 38, the coils of which decrease in diameter toward the top. On the top coil is a washer 39 contacted by the rivet head 30 of the pin 26. The rivet head 30 thus limits upward movement of the washer 39 but permits the washer to be depressed for compressing the spring 38. The purpose of this spring will be explained hereinafter.

Extending through openings 20a in the flanges 20 is a pivot pin 40 having rivet heads 4|a (Figs. 2 and 8) contacting the outer surfaces of said flanges. The staple magazine I2 as will appear hereinafter is pivoted to the pivot pin 40.

Said staple magazine I2 comprises a magazine body 4| having a bottom wall 42 and upwardly extending side walls 43. The bottom wall terminates forwardly of the rear ends of the side walls, as at 44. The rear ends of the side walls have downwardly extending ears 45 contacting the inner surfaces of the flanges `20. The'ears 45 have bearing openings 46 through which the pivot pin 40 passes. Said bottom wall 42 has an opening 41 forwardly of the rear edge 44 and concentric with the washer 39 but of smaller dimension than said washer. It will now be understood that should the staple magazine be swung downwardly, or in a counterclockwise direction, looking at Fig. 2, the bottom wall 42 of the staple magazine body 4| will contact the washer 39 and compress the spring 38. When pressure is released from the staple magazine said spring 39 serves to lift the staple magazine. When the staple magazine is depressed the upper end of the pin 26 projects through the 4opening 41 into the staple body.

The side walls 43 of the staple body have longitudinal inwardly pressed ribs 58 forming outer channels or tracks 5| for the purpose hereinafter appearing.

The bottom wall 42 terminates in an edge 52 rearwardly of the forward edges of the side walls 43. Said bottom wall 4| furthermore, has upwardly recessed portions 54 for the purpose hereinafter appearing.

The side walls 43 of the body are formed with notches 55 (Fig. 2) forwardly of the front edge 52 of lthe bottom wall 42, and said side walls have downwardly extending wings 56 forwardly of the notches 55 extending to the plane of the underside of wall 42. Extending upwardly from said channel shaped ribs 58 are side walls 51 (Fig. 2) having upper edges 58. At the front end of the magazine, the side walls 51 extend higher than edges 58 forming edges 59 and extending inwardly from the edges 58 toward each other are top flanges 68 (Figs. 2 and 5) for the purpose hereinafter appearing.

Extending upwardly from the side walls 51 of the magazine body 4| and rearwardly of the flanges 68, are hooks 6| 4formed with undershoulders 62. Extending downwardly from the shoulders 62 are edges 83 forming notches 64. The notches 64 have lower edges 65 disposed at a lower level than the edges 58. Extending upwardly from the rear ends of the edges 65 are edges 69 forming the rear ends of the notches 64. Extending rearwardly from the upper ends of the edges 69 are edges 10 from which extend upwardly edges 1| forming notches 12 extending forwardly from the edges 1| and undershoulders 13 from which extend upwardly edges 14. Extending rearwardly from lthe upper ends of the edges 14 are edges 15 which are at a higher level than the edges 58 but may be somewhat below the upper ends of the hooks 6|. The edges 15 extend to the rear ends of the side walls 51 and extending downwardly therefrom are edges 16.

In the upper rear corners of the side walls 51 of the magazine body 4| are aligned bearing openings 11 for the purpose hereinafter appearing.

Attached to the front end of the body 4| is a front xed cover 88 having a front wall 8| and side walls 82. The upper end of the wall 8| is curved upwardly and forwardly -to form a lip Bla for the purpose hereinafter appearing. The side walls 82 contact the outer surface of the

side walls

43, 51 of the body and are either riveted or welded or otherwise attached thereto. The front wall 88 is spaced from the front edges of the side Walls of the magazine body, thereby forming a track 82 for a plunger blade 84, which will be described in greater detail hereinafter.

f Within the magazine body 4I is a staple guide 90. Said guide 9|) comprises a top WallSIspaced somewhatbelow the channel ribs 50. Extending downwardly from the top wall 9| are side wallsA 92 contacting the upper surface of the bottom wall 42 of the staple body 4|. Cut from the top wall 9| are downwardly depressed tongues 94 contacting the upwardly recessed portions- 54 of the bottom wall 42. The tongues 94 are riveted to said upwardly recessed portions 54 as by 95.

The side walls 92 of the staple guide 90 are spaced inwardly from side walls 43 of the magazine body and form therewith a chamber to receive a staple strip S which may move forwardly toward the track 82. The side walls 92 extend to the plane of the forward ends of the side walls 43 of the magazine body so that the forwardmost staple in the staple strip S may be depressed by the plunger 84. At the forward end of the staple guide, the side walls have wings 90 which extend down to the plane of the undersurface of the bottom wall 42. Said wings 9B contact the forward edge 52 of the bottom-wall 42. Flaps of metal 50a from the side walls 0| and 82 of the front fixed cover 80 are pushed into notches 55 and forwardly of front edge 52.

Mounted on the staple guide is a pusher mechanism |00. Said pusher mechanism comprises a channel shaped pusher member having a top wall |02 and downwardly extending flanges |03. The top wall |02 contacts the top wall 9| of the staple guide 90 and flanges |03 -disposed between the side walls 02 of the staple guide and the inner surfaces of outer walls 43 of the magazine body 4|. Extending upwardly from the top wall of the pusher are apertured parallel ears |03a, |04 and |05. The ear |03a is at the front end of the pusher; the ear |04 is between front ear |03 and the rear ear |05. Extending through the aperture in the ear |05 is a horizontal push rod |00 riveted at its front end. Riveted to the rear end of the push rod, as at |01, is the back wall |08 of a back pusher member |09. Said back wall |00 is formed with an opening through which the reduced neck of the pusher rod passes. Extending forwardly from the rear wall |08 (Fig. ll) of the back member |09 are side walls ||0. Said side walls are formed at their upper ends with upward- 1y extending lugs Extending forwardly from the side walls ||0 are rail members |2 adapted to slidably engage within the channels 5| .of thev body.

Rockingly mounted on the back member |09 is a latch 4member H3. Said latch member ||3 comprises a top wall ||4 formed with slots||5 receiving the lugs and contacting the upper edges of the side walls ||0 and rear wall |00 of said back member. Cut from the top wall I |4 is a downwardly extending tongue I|6 contacting the inner surface of the back wall |08. At the lower end of the tongue is a hole ||1 through which is loosely received the push rod |06, thereby permitting rocking movement of member ||3 relative to the back member |09 about the lugs The top wall ||4 is adapted to con-tact and overlie upper edges of the side walls 51 of the magazine body. Extending downwardly from the front end of the top wall ||4 are parallel flanges ||8 from which extend outwardly, wings ||9 having rearwardly extending ends engaging within the notches 12 (Fig. 2). Said edges |20 thus engage the end edges 13 of the side walls 51 to retain the entire pusher` mechanism |00 against rearward movement.

Normally, the back wall |08 is spaced from the rear ends of the staple body and staple guide'. When it. is desired to: removeltheflpusher mechanism |00, pressurev isexertedforwardly.

against the back member |00 so that the entire pusher mechanism is pushed forwardly to release..

extending ends |20 of the latch member from the undershoulders 13.. The latch member||3 may thenbe rocked about the lugs Y| in a clock-- wise direction, looking at Fig. 2 of the drawing.v

The entire latch mechanism including members |00, ||3, and rod |06 and theipusher `|0|, mayv then be pulled rearwardly'and out-of the staple magazine.v Received on the pusher rod |06 but between the ear |05 and theL tongue ||6 is a coil compression spring l| 2| which normally tends to rock the latch device ||3 ina counterclock-l wise direction, looking at Fig. 2 of therdrawing., to retain the latch in engagement withv the magaziney body. The springV also urges the pusher forwardly to press the staple strip toward the front cover 80. r

opening 11 in the side walls 51 of the magazine body. Extending through the aperatures 11, |28a is a pivot pin |29 having rivet heads |29a at the ends thereof contacting the outer surfaces of the side walls |21. The pivot pin |29 is located above the pivot pin 40 and somewhat forwardly with respect thereto. Extending forwardly from the side walls |21 are flanges |23?) meeting on a bisecting plane and formingthei is formed with a pair of centrally aligned throughv openings |35 and |35 for the purpose hereinafter appearing.

upper head of the rivet contacts the top surface of the wall |26. tacts the'underside of the arm |38.

Extending downwardly from the forward end of arm |38 is an arm |40 formed with a T-shaped slot |4| having a top wider portion |42 and a central downwardly extending neck portion |43. The metal from which the slot was cut is bent forwardly to form a T-shaped head |43 having a forward wide portion |44 and a rear narrow neck portion |45. The driver blade 04 has a T-shaped slot |45 having a lower wide portion |41 and an upwardly extending narrower neck portion |40. The wide portion |44 of the head |43 is passed through the wide portion |41 of the slot |40 and then the blade 84 is moved downwardly to bring the neck portion |45 upwardly into the neck |43 of the slot |4B.- The upper end of the blade 84 will then be flush with the upper side of portion |38 of holder |39 so that when arm |38 is riveted by means of rivet |31 to the top wall |26 of the cover, the blade will be retained by the cover against upward movement or disengagement from the arm |40. The wings of the wide portion |44 of said head At the rear ends of the wall |21 are aligned apertures |28a which register with the` The lower end of the rivet con-` |43 contact the blade 84 and serve to snugly hold said blade against the arm |40. The lower end of the arm projects into the track 82. When the cover is swung toward the staple magazine the forwardly and upwardly curved lip 8| a serves as a guide to guide the lowerv end of the blade in to the track 82 and against the inner surfaces of the front wall of the cover 80.

The spring |51 normally presses the latch memberl |60 forwardly into engagement with the hooks 6|, thus the upper surface of member |36 engages beneath the under shoulders 62 of said hooks. When member |60 engages the hooks 6| the cover member |3 may be moved in a counterclockwise direction relative to the magazine |2. During such action the bar |60 contacting edges 63 will move downwardly within the notches 64 thereby deflecting the spring |52. When pressure is released from the pivoted cover, the spring |52 will raise the cover until the latch |60 contacts the undershoulders 62 to limit upward movement of the cover relative to the staple magazine.

To release the cover to permit the same to be swung all the way back, the ends of the bar |60 are gripped by two iingers of the user on extensions |6| (Fig. 3), and the bar is pulled back to disengage the bar from the hook 6|, and then i the cover may be swung all the way upwardly to uncover the top of the staple magazine to permit servicing, cleaning, removing jammed staples and the like. When the cover is swung downwardly again, the bar |60 will engage the downwardly and rearwardly inclined, or cammed or bevelled edges Sla at the top of the hooks, and said latch will be guided rearwardly against the same by spring |51 until it snaps beneath the hooks.

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 various changes might be made in the embodiment above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawings 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 byl Letters Patent:

1. In a stapler, a magazine, a cover pivoted to said magazine, means on the cover to drive staples from the magazine, said magazine comprising a magazine body formed with upwardly and rearwardly extending hooks, a latch bar slidable on said cover engageable with said hooks and spring means on the cover to retain said latch bar in engagement with said hooks, said spring means comprising a strip spring having a front end fixed in the underside of the cover, and a rear downwardly extending face and engaging the back of the latch bar and pressing the same forwardly to engage the rearwardly extending hooks on the magazine body.

2. In a stapler. a staple magazine, a cover pivoted thereto, said staple magazine being formed with a track through which staples may be ejected, a member attached to the cover and having a downwardly extending arm formed with a forwardly projecting T-shaped lug and a driver blade having a T-shaped slot, the neck portion of the lug passing through the neck portion of the slot, and the head of said lug holding the blade against said arm, and the upper end of said blade contacting the underside of said cover,

FRANK S. BOROUGHS.

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

UNITED STATES PATENTS Number Name Date 641,177 Young J'an. 9, 1900 1,671,733 Maynard May 29, 1928 1,687,871 Maynard Oct. 16, 1928 1,979,395 Minard Nov. 6, 1934 2,037,334 Maynard Apr. 14, 1936 2,251,915 Crosby Aug. 12, 1941 2,271,926 Pankonin Feb. 3, 1942 2,277,347 Pankonin Mar. 24, 1942 2,311,412 Pankonin Feb. 16, 1943 2,438,713 Maynard Mar. 30, 1948 2,445,180 Maynard July 13, 1948 2,466,551 Maynard Apr. 5, 1949 2,537,438 Berger Jan. 9, 1951 FOREIGN PATENTS Number Country Date 118,690 Australia July 7, 1944