US2957174A - Stapling device - Google Patents

Description

1960 J. J. OUSSANI 2,957,174

STAPLING DEVICE Filed Dec. 31. 1957 mn m m Q 5 mlmmmm k Fa: C

.50 54 I 6 James Oussani A44 ATTORNEYS United States Patent STAPLING DEVICE James J. Oussani, 777 th Ave., Brooklyn 32, N.Y.

Filed Dec. 31, 1957, Ser. No. 706,519

1 Claim. (Cl. 13)

This invention relates to a fastening device, and more particularly to a power impelled device for driving fastening elements, such as staples, adjustably at predetermined spacings from an edge portion of the articles to be fastened. Still more particularly, this invention relates to an improved, powerized, preferably electrically impelled stapler which utilizes a leading edge portion of the articles to be fastened as the means for triggering the electrical impeller, the said stapler including novel means permitting eflicient use of staples with legs of a wide variety of lengths.

This invention further relates to a stapling device of the type described which includes novel means for adapting to powerized operation and efliciently utilizing in such adaptation, the features of certain manually operated stapling devices as exemplified in the patent to Mueller 2,801,414 of August 6, 1957.

While it is well known in the art to utilize the electrical and pneumatic motors as sources of power for driving staples and like fasteners, as exemplified by my Patent No. 2,403,947 of July 16, 1946, and my application Serial No. 496,465, filed March 24, 1955, the modes heretofore employed have been subject to one or more disadvantages, which disadvantages have, in a measure, prevented a more widespread consumer acceptance of powerized fastening devices.

Such disadvantages included the necessity for providing a relatively large housing for correlating the motor and fastener assemblies, particularly where adjustable fastener positioning is desired. A further disadvantage frequently encountered is lack of rigidity in the motor control structure, which latter flaw decreases the efficiency of the device and, after long periods of use, may necessitate replacement of parts, or at least extensive readjustments of a magnitude requiring return of the machine to the factory.

-Another commonly found fault of such fasteners is the lack of a means permitting use of staples of a variety of lengths.

Still a further shortcoming inherent in most powerized staplers heretofore known, and particularly those assemblies wherein an ordinary manual stapler is adapted to powerized use, is the lack of a safe, convenient means of reloading the staple magazine without requiring the time consuming operation of readjustment of the relation of the parts to each other, including shutting off the source of impelling power.

, Accordingly, it is an object of this invention to provide in a relatively compact housing a powerized fastener of the adjustable type, having novel motor control means to assure long life, and prolonged eflicient operation.

A further object of this invention is to provide a stapler device capable of adjustment efiiciently to accommodate staples having legs of a Wide range of sizes. A still further object of this invention is to provide a stapler device of the type described which may be quickly and safely reloaded, without the hazard incident to requiring the operator to place his fingers near the staple turning anvil in effecting this operation.

To attain these objects and such further objects as may appear herein or be hereinafter pointed out, I make reference to the accompanying drawings forming a part hereof, in which Figure 1 is a side elevation of my device, with parts broken away to show detail;

Figure 2 is a fragmentary section taken on the line 2-2 of Figure 1;

Figure 3 is a magnified section taken on the line 33 of Figure 1;

Figure 4 is a fragmentary magnified section taken on the line 4-4 of Figure 2;

Figure 5 is an enlarged view of a portion of Figure 1.

Reference is now made to the drawings wherein a housing 10, of cast or sheeted metal or the like is provided with a base 11, separated from the head portion 12 by an open throat 13. The base 11 is preferably provided with suction cups 14 or the like, to dampen the noise incident to operation, as well as to avoid marring of the surface supporting the device, or slippage with respect thereto.

A solenoid 15, having slotted feet 16, is adjustably mounted on the bracket 17, extending inwardly from the head portion 12 of the housing 10 by bolts 18, or other aflixing means. An armature or magnetically responsive core 19, having an extending plunger 20, is slidably guided within the solenoid 15.

The housing 10 is provided on one side with an extended slotted depth edge gauge 21. An electrical control 22 is mounted to be slidably guided Within the gauge slot 21, a knurled knob 23 being provided for forward and rearward adjustment of the said control. As the said control has been described in detail in my aforementioned Patent No. 2,403,947, discussion herein will be limited to the phases of the said control pertinent to the instant invention.

The control 22 is provided with a trigger 24 adapted to straddle the throat portion 13 and, upon insertion of items to be fastened into trigger abutting position within the said throat, to close an electrical circuit, thereby energizing the solenoid 15.

The control 22 is provided further with an inwardly extending abutment finger 25 (see Figure 2) carrying the latch, which finger, when depressed, is adapted to unlatch the contacts to break the solenoid circuit.

A manually operable stapler assembly 26 is affixed to the base 11 of the housing 10 by a bolt 27 which extends inwardly through the said base into a threaded aperture 28 formed in the stapler 26. The stapler 26 is provided with a driver arm 29, pivotally connected at 30 to a base 31, which base carries a staple turning anvil 32 adjacent the front end 33 thereof. The driver arm 29, in addition, is provided with an L-shaped rail 34 which is mounted in spaced, offset relation to the said arm by means of bolts 35, 35 passing through the slots 36, 36, and forcing the rail 34 against the spacers 37, 37 extending between the arm 29 and the rail 34.

With the stapler assembly 26 operatively positioned within the housing 10, the plunger 20 will lie against the driver arm 29 at a point adjacent the unpivoted end thereof. 7

My device may be adjusted to permit staples to be driven a predetermined distance inwardly from the leading edge thereof. To accomplish this adjustment, the knurled knob 23 is loosened, permitting the control 22 to be advanced or retracted Within the slotted gauge 21 to the desired position, where it may be reset by tightening the knob. When the desired setting is effected, the articles to be fastened are inserted within the throat 13 to the point where they abut the trigger, thereby closing the circuit through the solenoid 15 and causing the driver arm 29 to be pivoted downwardly about the point 30 to the staple driving position. As the driver arm 29 reaches the fully descended staple clinching position, the abutment finger 25 isengaged by the rail member24 and is depressedthereby to the circuit breaking position, thus deactivating the solenoid 15 and permitting the driver arm 29 to return to the position shown in Figure l. V

. It will be readily recognized that the rail member34 is of a length to perform the deactivating function in ev: ery adjusted position of the'control 22. I

The adjustable connection between the rail member 34 and thed river arm 29 permits my device to efiect eff cient clinching of staples having legs of a wide variety of lengths insofar asthe adjustment permits automatic .deactivation of the impeller circuit to shut ofi the power to the impeller after the completion of the clinch stroke in accordance with the lengthof the legs .of the staple.

It has been determined that most efiicient operation of a powerized stapler can be secured onlywhere the timed deactivation of the impelling means is accurately coordinated with the leg length of staples used. Accordingly, I have provided mydevice with a simple adjustment which will permit the user accuratelyto retime deactivation of the solenoid to accommodate diiferentlysized staples, without necessitating removal of the stapling de-' vice 26 from the housing 10. V

To accomplish such retiming for gdifferent'leg lengths of staples placed in the channel 47 of the magazine in the usual way within the limits of the depth of the channel 47, it is necessary merely to depress the driver arm .29 manually until the bolts 35, 35 register with the opening 38 of the slotted gauge 21, and by means of a screw driver or thelike, reach through the opening 38 and loosen the said bolts. With the bolts 35, 3'5 thusloosened, the entire rail member 34 is rendered upwardly and downwardly movable within the range ofadjustment provided by the slots 36, 36. It will be readily recognized that when changing from a longerto a shorter staple, upward adjustment of the rail member 34 relative to the driver arm 29 will be required, andvice versa.

The driver arm 29 may likewise be provided with gauging lines delineating proper adjustment for staples of standard sizes When the desired adjustment of the rail member 34 is effected, the bolts 35, 35 are tightened, again fixedly positioning the rail member 34 relative ,to the driver arm To facilitate safe and rapid reloading of the magazine of my fastening device, I have .providednovel means for accomplishing the above mentioned operation without necessitating removal of the stapler from thehousing -or deactivation of the power source. Likewise, in carryfing out the reloading operation with my device, the dangerous operation of interposing the-fingers between the .driver arm 29 and the anvil 32 is obviated.

To accomplish the loading advantages as aforesaid, I have provided at a rearward positionon the housing 10, ;a knob 40 operatively connected to a stud 41, having .a rounded end 42, which stud is slidably guided in a bearing aperture 43 formed through the housing 10.

The knob 40 is normally biased tobe spaced outwardly from the housing 10 by a spring-44, V a

The stapler 26, as exemplified, by ithe said 'Mueller patent, is provided with a carrier arm 45 and a magazine 46, telescoping within said carrier arm, and .slidable outwardly therefrom.

The magazine 46 is provided with spaced parallel recesses 47, 47 adapted to receive staple legs, and upper shoulders 47a, 47a adapted to support the under-saddle portions of the staples. The magazine 46 is biased to lie outwardly telescoped from the carrier arm 45 by coil spring S, which spring also serves to feed the staples.

The carrier arm is provided with a detent 48, having at one end a rounded head portion 49 and at the other end an ear or dog 50, the said detent being slidably mounted in an opening 51 formed through the carrier arm 45, and biased upwardly relative to said arm by a spring 52 interposed between the arm 45 and the head 49. The dog 59 is provided with a forwardly inclined cam face 53 and a rearward shoulder portion 54 for purposes which will appear hereafter.

The carrier 45 and the'magazine .46 are provided with slots 55, 56, respectively, which slots, in the fully inwardly telescoped position of the magazine, register with each other (see Figure 4) I To reload the stapler, it is necessary merely to depress the knob 40, thereby forcing the detent 48 downwardly against the biasing pressure of the spring 52 through the contact of the end 42 and the head 49. As the detent is depressed, the rear shoulder 54 of the dog 5!) will release the rear shoulder 56:: of the magazine 46 thereby permitting the said magazine to be ejected from telescoped position within the carrier 45 (see Figure 2) under the influence of coil springs.

It is a simple matter, with the magazine thps extepded, to load a strip of staples, the legs ,of the said staples lying within the recesses or channels 47, 47 formed in the said magazine. The loadingpjrocess is completed and the device readied for continued operation by forcing the magazine inwardly against the biasing pressure of the Spring As the m gazin 46 rea he .the fully ne t position within the earrier45, the leading edge 57 of the magazine engages the m fac 5 o th ldog' 5 0, v en in the detent assembly 48 downwardly until the slots 55, 56 register, atwhich point the dog 50 will spring npwardly under the biasing influence of the spring 52, :lo 'cl(in'g the carrier 45 to the magazine 4 6 i I v Itshould be noted that at no timeflduring the loading process is it necessary for the operator to placehis fingers in the path between theanvil and the driving head. Likewise, no part of the loading operation takes place near the trigger 24, thereby providing a furthera'ssui'apce against accidental actuation of the device during loading.

By the above structure I have provided a fastener of compact outline and rugged design, assuring long life and trouble-free operation. The device is particularly adaptable in that, unlike other powerized fasteners, staplesvof a wide variety oflengths maybe employed. Further, the novel loading assembly. ofmy device assures speedy staple reloadingand maximum safety.

Having thus described my invention and ,illps'tratedjts use, what .I claim as new and desire tosecureby Letters Patent isr A powerized fastening device. comprising a housing, impeller means mounted within said housing,.a stapler device secured within saidhousing, saidlast named device including a driver arm positioned to be actuated by said impeller means, a carrier arm pivotally mounted relative to said driver arm, an elongated staplernagazinearranged to telescope within said carrier arm to a positiqn within said housing and spring biased normally to extendjfr'om said carrier arm to'loading. position outside sa'idhopsing, a depressible latching dog arranged to retain said magazine within said carrier arm against saidfbias'ing pressure and upon depressionto release said magazine, anjda plunger member extending through andreciprocably garried by said housing said plunger being .epe ativelya ciated. with said d 'ewhc c y .sa dmagaz nemayhe extended to leading position outside said .1 has by manually reciprocating, said plunger member "inwardly with respect .to said housing. a r

References .Citeddti the file Iof this patent

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