Punching apparatus
United States Patent 2730173
US Patent References:
/0318049.html
- - 0318049

/0527970.html
- - 0527970

/0599560.html
- - 0599560

/0627256.html
- - 0627256

/0805724.html
- - 0805724


Inventors:
Brescka, Rudolph S.
Publication Date:
01/10/1956
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Assignee:
WESTERN ELECTRIC CO
Primary Class:
83/399
Other Classes:
192/129R, 408/3, 83/565, 83/413, 74/483R, 83/520, 408/8
International Classes:
B21D28/26; B21D28/24
US Patent References:
0931781
1747240Perforating machine
1818836Stamping machine
1831213Piercing machine
1967626Duplicating punch press apparatus
2040388Safety device for cableway switches
2049444Drilling machine
2307617Statistical cards and means for and method of preparing them
2367568Sensing mechanism
2444240Interlocking mechanism
2501685Cap punching machine
2515124Method and machine for making invoices or charge tickets
2539902Hold-down guard mechanism for trimming presses
2562678Combination punch and cutter
2667922Machine for cutting sheet material
Foreign References:
GB200162A