US980787A - Paper-fastening punch. - Google Patents

Description

B. W. HURD.

PAPER PASTENING PUNGH.

APPLICATION FILED APR. G. 1910.

980,787., Patented Jan. 3, 1911.

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I ENTAMIN W. HURD, QF BRIDGEPORT, CONNECTICUT, ASSIGNOR lDI" TWO-THIRDS TO FREDERICKC. ROCKWELL, 0F WEST HARTFORD, CONNECTICUT.

PAPER-FASTENING PUNCH.

Specification of Letters Patent.

Application Ied April 6,

Patented Jan. 3, 1911.

1910. Serial No. 553,882.

To all whom it may concern:

Be it known that I, BENJAMIN 1V. HURD, a citizen of the UnitedStates, residing at Bridgeport, in the county of Faireld and State of Connecticut, have invented a new and useful Improvementin Paper-Fastening Punches, of which the following is a speciication.

This invention relates to a punch which is designed to fasten together sheets of paper by means of portions cut from themselves.

The object of this invention is to provide a punch of this nature, which has few parts, is simple and cheap to manufacture, and which cuts tongues and slotsand tucks the tonvues into the slots in the sheets of a er e a P P to be fastened.

The punch which is illustrated as an embodiment of the invention, has a pair of handle levers that are normally forced apartby a spring. One lever has a die and carries a perforated stripper. The other lever carries a swinging punch which cooperates with the die for cutting the tongues, and with the stripper for bending the tongues into the opening in a hooked spear which is carried by the punch lever, and that first cuts the slots and then draws the tongues therethrough.

Figure 1 of the accompanying drawings shows a side view of the punch, with the handles open.` Fig. 2 shows a'longitudinal section of the'punch with the handles closed. Fig. 3 shows a plan of the stripper. Fig. el. shows a front view of the hooked spear. Fig. 5 is an edge view of the lever which is provided with the die.

The levers 1 and 9., which are desirably stamped or drop forged to shape from sheet metal, are pivoted together by the pin 3. The handle ends of these levers are normally forced apart by the spring 4, and are prevented from coming too close together' by the studs 5, around which the ends of the spring are bent.

The punch G is pivotally held by the pin 7, in a recess in the end of the lever 1. A spring 8 normally retracts the pivoted punch. The free end 9 of the punch tits the die opening 10 in the die plate 11 that forms the hot-` toin of the recess in theA endof the lever 2. W'hen the punch is forced through the die opening, the lcooperation of these parts will cut tongues in whatever sheets of paper have been inserted between them.

The spear 12 is formed of an arc-shaped piece of metal that has one end fastened in the recess in the lever 1 in front of the punch. Oneedge -of this spear is cut away, as at 13, forming a hook l4,`which is sharpened on the end so that when the handles are forced together, and the punch passes through the die opening to forni the tongues, the. spear will also pass through a ,portion of the die o ening,land cutrslots adjacent -to the bases of the tongues. A stripper plate 15 is fastened to the lever 2 so as to extend between the working ends of the levers. This stripper plate has an openingl to ypermit the passage of the punch, andan opening 17 to permit the passage of the spear.

When the yhandles are forced together, as the punch continues to move after it has cut the tongues, its back edge 18 engages with the rear edge of the opening. 16 in the stripper plate. This forces the punch forwardly in suoliv manner that the 'tongues which have been out, are bent :by the point of the punch into the opening 13 below the hook of the spear. lNhen `the handles are4 released and are thrust apart by the spring which is between them, the punch is drawn down Athrough the die opening and opening in the stripper', being retracted during this movement by the kspring 8, and at theysame time the spear -is drawn'down. throughthe die opening and opening in the stripper, Iso that its hook pulls the tongues down throuoh the perforation which 't made througli the sheets that are to be fastened together.

The invention claimed is:

y1. Thecon'ibination in ar aper fastener, of a lever provided with a die, a lever provided with a spear, a swinging punch carried'by said latter lever and adapted to cooperate with thel die for cutting tongues, and `means for causing the punch to swingy after; it has cooperated with the die for bending the tongues into engagement with the spear.

2. The combination in a paper fastener, of a lever-provided with a die, la stripper at-1 tached to said lever, a lever provided with a spear, a swinging punch carried-by-said latter lever and adapted to coperate with the 3. vThe combination-1n a paper fastener, of

4 a lever provided with a die, a stripper atdie for'cutting tongues, and to be engaged 1 -With the die for cutting tongues, and by engagement with the stripper to be swung, after coperating with the die so as to bend the tongues into the hook of the spear.

4. The combination in a paper fastener, of a lever provided with a die, a stripper attached to said lever, a lever pivoted to said former lever, a spear attached to said latter lever, a punch pivotally connected with said latter lever and adapted to pass through the stripper and the die, and be swung forward on its pivot as the levers are closed, and a spring adapted to retract the punch as the levers are opened.

5. The combination of a die, a swinging tongue-forming punch adapted to be moved toward and through the die and t0 coperate therewith forcutting a tongue, and means for swinging the punch forward after it has passed through and cooperated with the die for bending forward the tongue which has been cut.

6. The combination of a die, a swinging tongue-forming punch movable toward and. from the die and adapted to coperate therewith for forming a tongue, and a stripper shaped to engage the punch and by such en-V gagement swing it forward after the punch has cooperated with the die for bending forward the tongue which has been cut.

7. The combination oa die, a swinging punch adapted to coperate with the die for cutting a tongue, a hook shaped spear arranged to move vv/ith the punch and cooperate with the die for cutting a slot, and means for swinging the punch forward after the tongue has been cut for "bending the tongue under the hook of the spear.

BENJAL'IN W. HURD.

' Witnesses MINNIE H. ALMAS, DANIEL T. FARRINGTON.

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