US2082822A

US2082822A - Machine for attaching staple fasteners to cards

Info

Publication number: US2082822A
Application number: US51570A
Authority: US
Inventors: George J Bruhn
Original assignee: NU PRONG FASTENER CORP
Current assignee: NU PRONG FASTENER CORP; NU-PRONG FASTENER Corp
Priority date: 1935-11-26
Filing date: 1935-11-26
Publication date: 1937-06-08
Anticipated expiration: 1954-06-08

Description

' G. J. BRUHN June 8, 1937.

MACHINE FOR ATTACHI NG STAPLE FASTENERS TO CARDS 2 Sheets-Sheet 1 Filed Nov; 26, 1955 i jnzvezToR ATTORNE Juqe 8, 1937. J, BRQHN I 2,082,822

MACHINE FOR ATTACHING STAPLE FASTENERS T0 CARDS Filed Nov. 26, 1955 2 Sheets-Sheet 2 Patented June 8, 1937 UNITED STATES ATENT OFFICE MACHINE FOR ATTACHING STAPLE FASTENERS TO CARDS George J. Bruhn, Great Neck, N. Y., assignor to Nu-Prong Fastener Corporation,

Harrison,

My invention relates to improvements in machines for attaching staple fasteners to cards and the like and is particularly adapted for use in applying the novel form of staple fastener shown and described in my co-pending application for patent Ser. No. 46,516, filed October 24, 1935.

An object of my invention is to provide means for applying and attaching staple .fasteners to cards or the like; a further object of the invention is to provide simple and convenient means whereby staple fasteners may be fed to a staple attaching device; a further object of my invention is to provide means whereby a strip of staple fasteners may be fed to a stapling machine and staples cut therefrom and attached to a card or the like.

A preferred embodiment of the invention is illustrated in the accompanying drawings as well as a modified form thereof.

I do not intend to confine the invention to the forms shown and described as modifications and changes may be made therein without departing from the spirit of the invention.

Referring to the drawings, Figure l is a side View of a preferred form of my machine,

Figure 2 is a front view of the same,

Figure 3 is a longitudinal section of the staple carrier and adjacent parts, on the line 33 in Fig. 2, with a strip of staple fasteners in position for use,

Figure 4 is a detail of the ram and anvil, with parts broken away, and showing acard in position on the anvil.

Figure 5 is a side view of. a modified form of the machine,

- Figure 6 is a plan view of the base plate,

Figure 7 is a plan view of the staple carrier, Figure 8 is a section of the staple carrier on the line 8-8 in Figure 7,

Figure 9 is a view of the face of the ram.

Figure 10 is .a view of a strip of staples adapted for us in the machine,

Figure 11 is a sectional view of a staple attached to a card, and

Figure 12 is a view of an optional form of staple fastener.

Similar characters of reference refer to like parts throughout the several views.

The machine comprises a base plate I, an anvil 2, a staple carrier 3 and a hammer 4.

The staple carrier rocks on a cross-pin 5 in the

standards

6, 6 and comprises a guide bar I seated in an open channel member 8 and forming therewith a longitudinal seat 9 for a strip of 5 staple fasteners Ill. The staple carrier 3 is mounted on the pin 5 in such manner that it will rest normally with its forward or delivery end raised or elevated to provide space under its forward end and above the anvil 2, in which space there may be inserted a card or sheet of 5 material to receive the staple as below described.

A clock spring II, coiled on apin l2 in the head 3 of the staple carrier 3, carries on its free end l3, a follower block It which bears against the end of the strip of staples l0 and 10 presses the said strip of staples forward against the channeled plate i5 at the forward end of the said channel or seat 9. A hook or finger hold I6 is provided on the block Hl whereby it may be drawn back against the tension of the 1,, spring H.

A flat spring guide H, on the head of the staple carrier has a free end 18 which normally rests beneath and supports the end staple l9 at the forward end of the staple strip I0. 20

In the head 3 of the staple carrier 3 there is provided a ram 20 which is normally supported in elevated position by means of coiled springs Zl carried by brackets 22 on the head 3 of the carrier 3. The lower operative face 25 of the ram 20 is preferably provided with a cross groove 23 for the purpose of receiving the raised loop portion 40 of the staple l9 and preserving its shape when the staple is inserted in a card as hereinafter described. 30

The hammer arm 4 rocks on the pin 4 and is provided with a head 24 in which is seated a plunger 25 which is normally extended by a spring 25 in the head 24.

The machine may be operated by power derived 35 from any source.

I have illustrated in Figures 1 and 2 a machine operated by foot power, for which purpose there is provided a treadle 21 on a lever 23 carried by a shaft 29 on the legs or supports 31 of 40 the table on which the device is mounted for use. The lever 28 is normally held in elevated non-operative position by means of a spring 32.

A link 33 connects the foot lever 28 and the hammer arm 4, whereby the machine may be 45 driven by the foot of the operator.

The device being thus assembled, the block I4 is withdrawn from the channel member 8 and a strip of staple fasteners is inserted on the guide bar I in the channel member 8 in advance 50 of the follower block it, which is then permitted to be drawn forward by the spring I I and presses the strip of staple fasteners forward in the channel' member 8 whereby the forward staple I9 rests against the stop l5 and below the ram 20 to be inserted, is placed on the anvil 29 below the said staple l9 and in the desired location for the attachment of the staple to the card, and the treadle 27 is depressed. The hammer arm 4 is thereby drawn down by the connecting link 33, the spring actuated rod 25 will press upon the head of the staple carrier 3 and cause it to descend in advance of the hammer 24 and pinch and hold the card 34 in position on the anvil 2 and the head 24 of the hammer arm 4 then descends upon the ram 20 which is forced down upon the staple [9, thereby cutting the said staple from the strip of which it forms a part, the supporting spring ll swings out of its normal position below the staple, and the prongs of the staple l9 are driven through the card 3d and bent over on the underside thereof by the inclined marginal edges of the seat 35 in the anvil 2, whereby the staple is secured to the card. The pressure on the foot treadle 21 is then released and the several parts return to their normal positions, the strip of staples Iii being advanced by the tension of the spring II, and the operation may be then repeated as may be desired.

My device is particularly adapted for use in applying to a card or other backing or book-cover, the form of staple fastener which forms the subject of my co-pending application Ser. No. 46,516, above mentioned, in which there is provided a staple fastener having four prongs and a raised strap or loop, as illustrated in Figures 10 and 11. For use in connection with a staple of the type there shown, the lower operative face of the ram 20 is provided with a cross-groove 23 whereby the pressure of the ram 28 is applied to the side marginal edges of the said staple so that the loop or raised strap of the staple is not disturbed but retains its elevated position with relation to the side straps of the staple.

For use in attaching staple fasteners of the type illustrated in Figure 12, in which there is provided on the staple an integral strap 4|, the channel member which is indicated in the preferred form of the device as 8, may be modified by providing side channels .2 for the said straps 4!, in the staple carrier or channel member.

There is shown in Figure 5 a modified form of the machine which is adapted to be operated manually. In this form of the machine, there is provided a hand lever 36 mounted upon the head 38 of the staple carrier, and the separate hammer arm shown in the form of the machine illustrated in Figures 1 and 2 may be omitted. In this modified form of the machine, the hand lever 36 may be supported in its normal inoperative position by means of a spring 31 at its base. The operation of the machine, in its said modified form, is similar to that above described. The machine in its said modified form is adapted for use with either form of staple illustrated. The staples being in position in the staple carrier, the hand lever 36 is depressed, thus rocking the staple carrier to depressed position on the card to which the staple is to be attached. As the lever 36 is further depressed, the hand lever 36 will descend upon the ram 20 and thereby drive the staple through the card.

Having thus described my invention, what I claim is:

1. In a device of the character described, the combination of a rocking staple carrier having a delivery end, a staple cutting ram carried by the said delivery end of the staple carrier, spring means normally supporting the said ram in raised position, a hammer supported above the said ram and spaced therefrom, means for moving the said hammer against the said ram, a spring actuated plunger operable between the said hammer and the staple carrier and positioned to form a contact between the delivery end of the staple carrier and the hammer in advance of the contact between the hammer and the said ram, and an anvil below the ram and positioned to receive the impact thereof.

2. In a device of the character described, the combination of a rocking staple carrier having a delivery end normally elevated, a ram carried by the delivery end of the staple carrier, spring means normally supporting the said ram in raised position, a hammer supported above the said ram and spaced therefrom, means for moving the said hammer against the said ram, a spring actuated plunger seated in the said hammer and positioned to contact with and depress the delivery end of the staple carrier when elevated in advance of the contact between the hammer and the ram and a member positioned to receive a blow from the ram.

3. In a device of the character described, the combination of a rocking staple carrier having a delivery end normally elevated, means for advancing staples on the said staple carrier, a ram carried by the delivery end of the said staple carrier, spring means normally supporting the said ram in raised position above the end staple when advanced on the said staple carrier, a hammer supported above the said ram and spaced therefrom, means for moving the said hammer against the said ram, and means between the said hammer and the said staple carrier whereby the delivery end of the staple carrier is pressed down upon a card to receive staples, in advance of the contact between the hammer and the ram.

GEORGE J. BRUHN.