[54] PROGRAMMABLE MAGNETIC REPULSION PUNCHING APPARATUS
[75] Inventor: Karl F. Stroms, Wappingers Falls, N.Y.
[73] Assignee: International Business Machines Corp., Armonk, N.Y.
[21] Appl. No.: 218,186
[22] Filed: Jul. 13, 1988
[51] Int. CL* B26D7/18
[52] U.S. CI 83/76.1; 83/100;
83/171; 83/169; 83/365; 83/367; 83/552;
83/575
[58] Field of Search 83/170, 171, 365, 367,
83/552, 100
[56] References Cited
U.S. PATENT DOCUMENTS
3,351,740 11/1967 Heuer 83/365
3,695,130 10/1972 Fedrigo 83/13
3,730,039 5/1973 Fedrigo 83/575
3,822,622 7/1974 Smith et al 83/100
4,209,129 6/1988 Haas et al 83/171
4,425,829 1/1984 Kranik et al 83/62.1
FOREIGN PATENT DOCUMENTS 615573 2/1961 Canada .
OTHER PUBLICATIONS
IBM Technical Disclosure Bulletin, vol. 13, No. 4, Feb. 13, 1971, p. 2536.
IBM Technical Disclosure Bulletin, vol. 16, No. 12, May 1974, p. 3933.
IBM Technical Disclosure Bulletin, vol. 20, No. 4, Sep. 1977, p. 1379.
U.S. patent application Ser. No. 837,933, filed Mar. 10, 1986.
Primary Examiner—Frank T. Yost
Assistant Examiner—Thomas Hamill, Jr.
Attorney, Agent, or Firm—Ira David Blecker
[57] ABSTRACT
A punch apparatus for punching hole patterns in thin sheet material. The apparatus includes a housing having a liquid-cooled cavity therein; a coil mounted in the liquid-cooled cavity; a driver disk made of a highly conductive material mounted in the liquid-cooled cavity, the driver disk mounted adjacent to the coil; a driver button located outside of the liquid-cooled cavity but in communication with the driver disk; and a punch element for perforating thin sheet material aligned with the driver button. Finally, the apparatus includes an electrical source for energizing the coil with a pulse of electrical energy for generating flux linking the driver disk and the coil to repel the driver disk from the coil, thereby translating the driver button and the punch element, causing the punch element to perforate a thin sheet of material.
14 Claims, 6 Drawing Sheets
