US1786870A - Stapling machine - Google Patents

Description

Dec. 30, 1930. A. H. SCHMIDTKE 1,735,370

STAPLI NG MACHINE Filed Jan. 18, 1929 2 Sheets-Sheet l b T INVENTOR ilh rf ff. Jdzmz'dike ATTORNEY Dec. 30, 1930. A, H, SCHMIDTKE 1,186,870

STAPLING MACHINE Filed Jan. 18, 1929 2 Sheets-Sheet 2 g \\\\\\\\\\l m tfA L I [1V VLN TOR W rain/J A TTORNE rs Patented Dec. 30, 1930 UNITED STATES ALBERT H. SGHMIDTKE,

PATENT OFFICE OF ST. JOSEPH, MICHIGAN, ASSIGNOB TO ST. JOSEPH IRON WORKS, OF ST. JOSEPH, MICHIGAN STAPLTNG MACHINE Application filed January 18, 1929. Serial No. 333,348.

This invention relates to improvements in stapling machines.

The object of the invention is to provide compensating means for stapling varying thicknesses of material automatically with out adjustment of the machine and to provide for relieving the machine of stress when a staple is driven home.

Objects pertaining to details and economies of construction and operation will appear from the description to follow. A preferred embodiment of my invention with separate modified forms as applied to a standard design of stapling machine is illustrated in theaccompanying drawing, in which:

Fig. 1 is a side perspective view of essential parts of a standard design of stapling machine with my improvements incorporated, the front plate of the stapler being omitted.

Fig. 2 is an enlarged detail side elevation view of the staple former and driver in the driving position.

Fig. 3 is a. similar enlarged detail vertical sectional view on a line corresponding to line 33 of Fig. 1 showing my improved compensating means in tripped position, the contactends of the staple driver and staple former being at the same height and tripped to show the result when extra thickness of board or material is encountered.

Fig. 4 is a detail view of a modified form of the toggle trip showing an independent separate trip rod and means to strike the Work and a projecting arm on the toggle to facilitate the tripping action, the parts being in initial position.

Fig. 5 is a detail elevation of the front of i a staple former and driver of modified form with a simple latch retaining means and a yielding direct spring holding the staple driver and former yieldingly downward after the tripping action has occurred, the parts being in initial position.

The parts will be identified by their numerals of reference which are the same in all the views.

1 is the frame of the machine. 2 isthe plunger for actuating the stapler. 3 is the cross head carrying the staple forming and driving means. 4 represents the wire feed for the stapler which is actuated by the dog 5 carried on the cross head 3 in a usual and Well-known-manner. 6 is the wire that is being fed into the stapler. These parts are here all shown in conventional form and are of a standard design for the purpose.

7 is the outer staple forming member and support reciprocating in suitable vertical guides 8, 9 which guides are adjustable by the set screws 10. The staple former is bifurcated at its lower end and adapted to cut the wire and form the staple and sup-- port the same for driving in the usual wellknown Way, only so much of this being shown as is necessary, the central folding finger being entirely omitted and also the connection for operating the wire cutter.

11 is the staple driver adapted to reciprocate within the bifurcated end of the staple former 7 and is carried by a slide 12 which is provided with a guide pin 121 secured thereto by cap screw; 13 is the guide socket which is secured by adjusting nuts 131, 131 on the cross head 3 in which guide pin 121 reciprocates. 14 are cars provided on the socket 13 and 15 is a lug provided on the staple driver slide 12. The ear 14 and. the lug 15 are connected by a toggle joint made up of links 16 and 17 with a. hinge pin 18 therebetween. The toggle is held yieldingly in the vertical position by spring 19 which connectshinge pin 18 to a lug 20 on the cross head 3.

When the toggle is in the position indicated in Fig. 2 and the cross head 3 is operated the staple is forcibly driven to its work so long as the toggle is maintained in that position. When the staple is driven the toggle is tripped so that the driving pressure on the staple is released and jambin of the work and undue strain is avoided. trip pin 21 is secured by bracket 22 to the staple forming member 7 and reciprocates through the lug 15. It has a beveled contact end 211 disposed to hit the hinge pin 18 of the toggle and trip the same. Spring 212 is provided on the trip pin 21 to hold the staple former yieldingly downward.

is completely driven.

The relative movement of the staple former 7 and the staple driver 12 is such that just as the driver has forced the staple home in its work the trip pin 21 contacts at its end 211 against the hinge pin 18 and trips the toggle releasing the pressure and avoiding any further staple driving action and thus prevents jambing the staple driver into the material being worked upon and thereby avoiding injury of the same and, at the same time,- avoids any undue strain on the machine.

The position of the tripped staple driver is indicated in Fig. 3. It will thus be seen from this arrangement of the parts that the driving connection by the driving head 3 and the stapler is broken at the point when the staple The staple driver is held yieldingly to its work by spring 23 to insure its prompt working when the cross head is raised.

In Fig. 5 I show a modification. The former 7 and the staple driver 11 are the same and in the same relation as in the preferred form. The staple driver slide 12 is not provided with the guide pin but is provided with a vertical slot 123 in which is disposed the guide pin 31 on the cross head 3. A coil spring 32 is interposed between lug 33 on the cross head 3 and lug 124 on the slide 12 to hold the same yieldingly downward.

In place of the trip pin 21 I provide trip pin 24 secured by cap screw 241 to the staple former member 7, the upper end being disposed to act upon the trip latch to release the staple driver at the right time. I provide a trip latch 25 pivoted at 251 to the cross head 3 and held to its work by spring 252, the same being notched at 253 to engage the upper end of the staple driver slide 12. A projecting trip pin 254 is provided on latch 25 for actuation by the trip finger 24, all as seen in Fig. 4.

This is a very simple form of my invention and operates very eifectively.

In Fig. 4 I show a further modification, the former 7 and the driver 11 being the same as before. The driver slide 12 is suitably guided on the cross head 3 and connected directly by pivot screw 125 to the lower toggle 17 The upper-toggle 16' is pivoted at 34 to the cross head 3. A projectin trip finger 171 is on the toggle link 17'. n independent trip pin 24 is supported in guide 242 carried by the slide 12 and is provided with a stop collar 243 towards its upper end and a spring abutment collar 244 for spring 245 which holds the said pin yieldingly downward. The lower end of the pin 24 projects to the same height as the staple former 7 and is adapted to contact with the work being stapled. It is square at its upper end and is of such length that it operates the trip finger 171 and is timed to break the toggle when the staple is completely driven, thereby doing the same work in the same way as the trip pin carried by the staple former, but entirely independent thereof.

26 indicates in each view the actuating latch for the staple former to hold it in position to cut the staple from the wire as it is fed along. As my invention does not pertain to this feature I have merely illustrated the latch in the usual form and do not describe in detail its operation which is well-known to those skilled in the art.

It is clear that my stapling machine improvements can be greatly modified. I, of course, prefer the toggle tripping means but it is clear that a simple latch is sufiicient. While I have shown springs for urging the staple driver downward, it could be made of sufiicient weight to drop down and would drop down anyway, only its action would be rather slow.

I desire, therefore, to claim the invention in the specific toggle form and also desire to claim the same broadly by whatever means the driver is returned to initial position or by whatever means it is locked and tripped as pointed out in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a stapling machine, the combination of the reciprocating driver head, an adjustable socket piece secured thereto having laterally projecting ears, a staple driver, a staple driving slide plate having a laterally projecting lug and having a guide pin adapted to reciprocate in the said socket, a trip toggle connection between the ears and lug on said socket and slide plate, a spring to hold the toggle in actuating position, a staple former cooperating with the said staple driver, and a projecting trip pin on said staple former timed to trip the said toggle connection and release the pressure after a staple has been driven, as specified.

2. In a stapling machine, the combination of the reciprocating driver head, a staple driver, a trip toggle connection between said reciprocating head and staple driver, a staple former cooperating with said driver to form and support the staple, and a trip pin on the staple former disposed and timed to contact with the said trip toggle connection to trip the same to release the pressure when the staple is driven home, as specified.

3. In a stapling machine, the combination of the reciprocating driver head, a staple driver, a trip connection between said reciprocating head and staple driver, ar staple former cooperating with said driver to form and support the staple, and a trip pin on the staple former disposed and timed to contact with the said trip connection to trip the same to release the pressure when the staple is driven home, as specified.

4. In a stapling machine, the combination of the reciprocating driver head, a staple driver, a trip tog 1e connection between said reciprocating hea and staple driver, a staple former cooperating with said driver to form and support the staple, and a trip means dis-' posed and timed to contact with the said trip toggle connection to trip the same to release the pressure when the staple is driven home, as specified.

In witness whereof I have hereunto set my hand.

ALBERT H. SCHMIDTKE.

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