US2140169A

US2140169A - Wire-severing mechanism

Info

Publication number: US2140169A
Application number: US58279A
Authority: US
Inventors: Alfred L Rosenmund
Original assignee: Stapling Machines Co LLC
Current assignee: Stapling Machines Co LLC
Priority date: 1936-01-09
Filing date: 1936-01-09
Publication date: 1938-12-13
Anticipated expiration: 1955-12-13

Description

Dec. 13, 1938. A. LROSENMUND WIRE SEVERING MECHANISM I Filed Jan. 9, 1956 s Sheets-Sheet 1 INVENTOR A L. QDSE NMU N D BY /%RNEYS.

Dec. 13, 1938. A, RosENMUND 2,140,169

WIRE SEVERING MECHANISM Filed Jan. 9, 1936 3 Sheets-Sheei 2 INVENTOR.

A.L.EOSE.NMUND A TTORNEYS.

Dec. 13, 1938. A} A ROSENMUND 2,140,169

WIRE SEVERING MECHANISM Filed Jan. 9, 1936 3 Sheets-Sheet 3 f 2 S 2" w INVENTOR. ALROSENMUND A TTORNEYS.

Patented Dec. 13, 1938 UNITED STATES PATENT! OFFICE WIRE-SEVERING DIE'CHANISM aware Application January 9,

22 Claims.

This invention relates to wire-cutting mechanism and particularly to wire-cutting mechanism for use in a machine of the type disclosed in my Patent No. 1,933,031 of October 31, 1933.

It is an object of the invention to provide a wire-cutting mechanism of the character de-- scribed which is eiiicient and durable.

It is a further object of the invention to provide a cutting mechanism of the character described which is adapted to sever cleanly very flexible or soft wire as well as stiffer or "hard wire.

One illustrative embodiment of the invention is shown in the accompanying drawings, in which:--

Figure 1 is atop plan view of a cutting mechanism embodying the invention.

Fig. 2 is a sectional view of the same'taken on the line 2--2 of Fig. 1.

Figs. 3, 4 and 5 are top plan views on a smaller scale and showing the positions of the parts during various phases of a cycle of operation.

Fig. 6 is a perspective view of a modified form of cutter block which may be used.

Fig. 7, 8 and 9 are top plan views of the cutting mechanism employing the modified cutter block shown in Fig. 6 and showing the positions of the parts during the various phases of a cycle of operation.

Fig. 10 is a sectional view taken on the line Illill of Fig. 8.

Fig. 11 is a sectional view taken on the line II-ll of Fig. 9.

Fig. 12 is a top plan view of a pair of wireconnected box parts upon which the cutting mechanism of this invention is adapted to operate to sever the wires between the box parts.

Fig. 13 is a side elevation of the same box parts after the wires between them have been severed and prongs formed on the ends of the mechanism shown and described in said patent. It will therefore be described as used in a machine of that type, although it may be used in other types of machines and for other purposes.

The machine of my said patent is adapted to receive on a supporting table a pair of wire- 1936, Serial No. 58,279

connected box parts such as those shown in Fig. 12, in which the box parts are designated A, the wires connecting them W, 'and the stables which secure the wires to the box parts S. The machine operates to sever the wires W between the box parts A, form prongs P (see Fig. 13) on the severed ends, swing the prongs P over their respective box parts A to form bights B (see Fig. 14) and drive the prongs P into the box parts A to perpetuate the bights B. 'In the operation of said machine, each wire W is positioned between two cutting blocks, one of which is stationary and the other of which is movable toward and from the stationary block, the wire being severed between the two cutting blocks when the movable block is forced against thestationary block.

Such a cutting mechanism has been found to be generally satisfactory, but it has been found in practice that when very flexible or soft wire is being operated upon the cutting mechanism sometimes fails to sever completely the wire, and when this happens shims are left on the wire ends which interfere with the subsequent driving of the wire ends into the box parts.

The present invention is intended to eliminate the objectionable features of the prior cutting mechanism referred to above, and to provide cutting mechanism which is adapted to sever completely and cleanly any binding wire which is suitable for use in the manufacture of boxes regardless of variations in its flexibility or stiffness.

Referring to Fig. 2, the illustrative cutting mechanism comprises two cutting blocks I and 2 slidably mounted'in a casing 3 and having respectively cutting edges I and 2 The blocks I and 2 are normally held in spaced relationship by a spring 4 interposed between the blocks. Secured to the right hand end of block 2 (viewing Fig. 2) is a head 5 which by contact with the casing 3 limits movement to the left of both blocks I and 2.

The blocks are held normally in the position shown in Fig. 2 by a spring 6 which is interposed between the head 5 and a bar 'I secured to casing 3 by adjusting screws 8. The spring 6 presses against the head 5 and normally holds the head 5 against casing 3, as shown in Fig. 2.

To sever the wire when it is positioned between blocks I and 2, block I is moved toward block'2 by a plunger 9 having a cam surface I 0 to engage a cam surface II on block I. Plunger 9 enters casing 3 through an opening I3 formed therein. Plunger 9 may be operated in the manner (115- 55 closed in my said patent or in any other suitable manner. I

In Fig. 3, the wire W is shown in position between blocks 1 and 2. When plunger 9 contacts block I and moves it toward block 2, the wire W is pushed against cutting edge 2 of block 2, as shown in Fig. 4, and block Zis moved against the action of spring 6 to the position shown in Fig. 4. This movement compresses spring 6 and creates therein a spring pressure tending to move block 2 toward block I.

When plunger 9 has completed its drive stroke and movement of block I ceases, the spring pressure stored in spring 6 exerts itself to force block 2 and its cutting edge 2 toward block I and completely sever any film of wire which may remain between the blocks when block I has ceased to move.

The action and movement of the blocks apparently causes two successive cutting operations, which together completely sever the wire. The first severing operation takes place when block I forces the wire against block 2 and moves block 2 against the action of spring 6. In some instances this movement completely severs the wire and the second severing action is unnecessary. In other instances, however, the first severing action partially severs the wire, still leaving, however, a portion of the wire intact. happens, the return or recoil movement of the block 2 under the action of the compressed spring 6 completes the severing operation.

Referring to Fig. 6, the return or recoil action of the cutting edge 2 may be effected by using the form of cutter block there shown and designated 20. When such a block is used, the spring 6 may be dispensed with and the body of the block may be fixed to the casing 3. As a substitute for spring 6, block 20 is slotted as at l2 so that when pressure is exerted against the cutting edge 2 the slot l2 will be closed, as shown in Fig. 10. Closing the slot I 2 creates a return or recoil pressure in the cutting edge 2 of the block similar to the return or recoil pressure created by the spring 6 in the construction shown in Fig. 2 to perform the second severing action hereinbefore referred to.

Figs. 7 to 11 illustrate the operation of the cutting mechanism when the block 20 is employed.

As heretofore stated, the cutting mechanism of this invention is intended to be used in machines of the type disclosed in my said Patent No. 1,933,031 and reference to said patent is hereby made for a detailed description of such a machine.

It will be understood that the invention is not to be limited to the specific embodiment shown for purposes of illustration as it may be variously embodied without departing from the invention.

It will also beunderstood that all of the features of the invention need not be used conjointly as they may be used in various combinations as defined in the sub-joined claims.

I claim:

1. Ina machine for manipulating a flexible binder secured to a box part to form and perpetuate a bight on the binder, mechanism for severing the flexible binder comprising a pair of cutting members, means yieldingly to hold them in spaced relationship to receive the flexible binder between them, means to move one member toward the other and through pressure of the first member to move the second member in the same direction, and means yieldingly to resist said movement of the second member.

When this 2. In a. machine for manipulating a flexible binder secured to a boxpart to form and perpetuate a bighton the binder, mechanism for severing the flexible binder comprising a pair of cutting members, means yieldingly to hold them in spaced relationship to receive the flexible binder between them, means to move one member toward the other and through pressure ofthe first member to move the second member in the same direction, and spring means to resist said movement of the second member.

3. In a machine for manipulating a flexible binder secured to a box part to form and perpetuate a bight on the binder, mechanism for severing the flexible binder comprising a pair of cutting members, means yieldingly to hold them in spaced relationship to receive the flexible binder between them, means to move one member toward the other and through pressure of the first member to move the second member in the same direction, and recoil means tending to return said second member to initial position.

4. In a machine for manipulating a flexible binder secured to a box part to form and perpetuate a bight on the binder, mechanism for severing the flexible binder comprising a pair of cutting members each having a cutting edge, means yieldingly to hold the members in spaced relationship to receive the flexible binder between them, means to move one member toward the other and through pressure of the first memher to move the cutting edge of the second membinder secured to a box part to form and perpetuate a bight on the binder, mechanism for severing the flexible binder-comprising a pair of cutting members each having a cutting edge, means yieldingly to hold the members in spaced relationship to receive the flexible binder between them, means to move one member toward the other and through pressure of the first member to move the cutting edge of the second member, and spring means to resist said movement of the cutting edge of said second member.

6. In a machine for manipulating a flexible binder secured to a box part to form and perpetuate a bight on the binder, mechanism for severing the flexible binder comprising a pair of cutting members each having a cutting edge, means yieldingly to hold the members in spaced relationship to receive the flexible binder between them, means to move one member toward the other and through pressure of the first member to move the cutting edge of the second member, and recoil means tending to return the cutting edge of said second member to initial position.

'7. In a machine for manipulating a flexible binder secured to a box part to form and perpetuate a bight on the binder, mechanism for severing the flexible binder comprising a pair of cutting members to sever the binder therebe tween, means to move one member toward the other and through pressure of the first member to initiate a severing operation and move the second member in the same direction, and re-' coil means to move the second member toward the first member after movement of the first member has ceased and thereby complete the severing operation.

8. In a machine for manipulating a flexible binder secured to a box part to form and perpetuate a bight on the binder, mechanism for severing the flexible binder comprising a pair of cutting members each having a cutting edge, means to move one member toward the other and through pressure of the first member to initiate a severing operation and move the cutting edge of the second member in the same direction, and recoil means to move the cutting edge of the second member toward the cutting edge of the first member after movement of the flrst member has ceased and thereby complete the severing "operation.

9. In a machine for manipulating a flexible binder secured to a box part to form and perpetuate a bight on the binder, mechanism for severing the flexible binder comprising a cutting member, means to press the flexible binder thereagainst to initiate a severing operation and move the cutting member, and means yieldingly to resist movement of the cutting member and .cause a reverse movement thereof to complete the severing operation.

10. In a machine for manipulating a flexible binder secured to a box part to form and perpetuate a bight on the binder, mechanism for severing the flexible binder comprising a cutting member, means to press the flexible binder thereagainst to initiate a severing operation and move the cutting member, and spring means to. resist movement of the cutting member and cause a reverse movement thereof to complete the severing operation.

11. In a machine for manipulating a flexible binder secured to a box part to form and perpetuate a bight on the binder, mechanism for severing the flexible binder comprising a cutting member, means to press the flexible binder thereagainst to initiate a severing operation and move the cutting member, and recoil means to return said cutting member toward initial position to complete the severing operation.

12. .In a machine formanipulating a flexible binder secured to a box part to form and perpetuate a bight on-the binder, mechanism for severing the flexible binder comprising a cutting member having a movable cutting edge, means to press the flexible binder against the cutting edge to initiate a severing operation and move the cutting edge, and means yieldingly to resist movement of the cutting edge and cause a reverse movement thereof to complete the severing operation.

13. In a machine for manipulating a flexible binder secured to a box part to form and perpetuate a bight on the binder, mechanism for severing the flexible binder comprising a cutting member having a movable cutting edge, means to press the flexible binder against the cutting edge to initiate a severing operation and move the cutting edge, and spring means to resist movement of the cutting edge and cause a reverse movement thereof to complete the severing operation.

14. In a machine for manipulating a flexible binder secured to a box part to form and perpetuate a bight on the binder, mechanism for severing the flexible binder comprising a cutting member having a movable cutting edge, means to press the flexible binder against the cutting edge to initiate a severing operation and move the cutting edge, and recoil means to return the cutting edge toward initial position to complete the severing operation.

15. Wire-severing mechanism comprising, in combination, a cutting member, means to initiate a severing operation and press a wire thereagainst to move the cutting member, and means yieldingly to resist such movement and cause a reverse movement thereof to complete the severing operation.

16. Wire-severing mechanism comprising, in combination, a cutting member, means to press a wire thereagainst to initiate a severing operation and move the cutting member, and spring means to resist such movement and cause a reverse movement thereof to complete the severing operation.

17. Wire-severing mechanism comprising, in combination, a. cutting member, means to press a wire thereagainst to initiate a severing operation and move the cutting member, and recoil means tending to return the cutting member toward initial position to complete the severing operation.

18. Wire-severing mechanism comprising, in combination, a cutting member having a movable cutting edge, means to press a wire against the cutting edge to initiate a severing operation and move the cutting edge, and means yield ingly to resist such movement and 'cause a reverse movement of the cutting edge to complete the severing operation.

19. Wire-severing mechanism comprising, in combination, a cutting member having a mov able cutting edge, means to press a wire against the cutting edge to initiate a severing operation and move the cutting edge, and recoil means to return the cutting edge toward initial posi' tion to complete the severing operation.

20. Wire-severing mechanism comprising a pair of cutting members, means to move one member toward the other and through pressure of the first member to initiate a severing operation and move the second member in the same direction, and recoil means to move the second member toward the first member after movement of the first member has ceased and thereby complete the severing operation.

21. Wire-severing mechanism comprising a pair of cutting members each having a cutting edge, means to move one member toward the other and through pressure of the first member to initiate a severing operation and move the cutting edge of the second member in the same direction, and recoil means tending to return the cutting edge of the second member toward initial position to complete the severing operation.

22. Wire-severing mechanism comprising, in combination, a cutting member having a cutting edge and slotted to permit the cutting edge to be moved toward the body of the cutting member,.and means to press a wire against the cutting edge and to move the cutting edge toward the body of the cutting member whereby closure of the slot will create a recoil pressure in the cutting edge.

ALFRED L. ROSENMUND.

7 CERTIFICATE OF CORREGTION. Patent No. 2,ll .0 ,169. December 13, 1953.

ALFRED L. nosmmmo.

It is hereby certified that error appeare in the printed specification of the above numbered patent requiring correction as follows: Page 3 second column, lines Sand 6, claim 15, strike out the words "initiate a severing operation and" and. insert the same after 'to" in line 7, same claim; ami

that the quid Letters Patent should be read with this correction therein that the money conform to the record of the one in the Patent Office.

Signed and sealed this 6th day or June, A. n. 1939.

v Henry Van Arsdale (Seal) Acting Commissioner of Patent!a