Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1992-08-07
1993-09-28
Powell, William A.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
1566591, 156510, 156905, B44C 122, C23F 100
Patent
active
052483835
ABSTRACT:
Processes for producing cutting dies disclosed herein comprise a step of forming on a steel plate a resist, a first etching step of etching this steel plate to form a convex portion having a prescribed height thereon, and a second etching step comprising removing the resist extending from both ends of the top of the convex portion, followed by etching. In the present invention, is is possible to carry out the second etching step several times and also possible to etching further the steel plate after removal of all of the resist remaining on the top of the convex portion. According to the present invention, there are obtained cutting dies having a sharp cutting edge and an arbitrary width of the bottom portion of the edge.
REFERENCES:
patent: 3045321 (1962-07-01), McDermott
patent: 3758350 (1973-09-01), Weglin
patent: 4102735 (1978-07-01), Weglin
patent: 4264410 (1981-04-01), Frantzen
patent: 4497686 (1985-02-01), Weglin
Lintec Corporation
Powell William A.
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