B - Operations – Transporting – 44 – B
Patent
B - Operations, Transporting
44
B
18/1056, 101/14,
B44B 5/02 (2006.01) B29D 99/00 (2010.01) B29C 59/00 (2006.01) B29C 59/04 (2006.01) B29C 63/00 (2006.01) B29C 63/14 (2006.01) B31F 1/07 (2006.01) F16C 13/00 (2006.01)
Patent
CA 1097875
ABSTRACT OF THE DISCLOSURE A resurfaceable rotary die counter is prepared by employing a cylindrical counter core having a central, circumferentially extending relieved area filled with readily replaceable synthetic resin material containing pre- tensioned, spirally wound glass fiber roving which renders the resin craze and crack resistance even under extended continuous we. Economical counter production is possible because of preparation of the counter on the press during makeready using the die as a counter forming element. The resin is run in against the die prior to hardening of the same to form a reverse design surface in the counter which exactly mates with the doe surfaces. A viscous resin having a minimum viscosity of about 6000 cps. is employed which has the characteristics of remaining on the counter core without substantial flow until ultraviolet cure can be effected. Fiber glass roving spirally wound under tension around the resin backed core during application of successive resin layers thereto provides a ten fold increase in strength over previously available systems.
271300
Brown William E.
Magee Ramon J.
Mc Coy Dennis R.
Gowling Lafleur Henderson Llp
Hallmark Cards Incorporated
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