Thomas E Gavin

US Patent:

45371296, Aug 27, 1985

Filed:

Mar 5, 1984

Appl. No.:

6/586157

Inventors:

Frederick F. Heinemann - Canton MA
Thomas O. Gavin - Harvard MA

Assignee:

W. R. Grace & Co. - Cambridge MA

International Classification:

B41N 900

US Classification:

1014151

Abstract:

A method of making-up offset printing cylinders having lock-ups positioned in gaps in the cylinders by use of a two piece system involving adhering a compressible printing element to the cylinder with at least one edge extending into the lock-up gap, trimming the edge extending into the lock-up gap, thereafter pulling a non-compressible printing element carrying the printing ink indicia receptive working surface taut over the compressible printing element and securing the ends of the non-compressible printing element in the lock-up under tension. The two piece system involves separating the relatively thick compressible portion of the offset printing blanket from the relatively thinner ink transfer surface of the offset printing blanket. Also a separate embodiment with pressure sensitive adhesive securing the two piece system together and not limited to offset printing cylinders, product and method.

US Patent:

44521430, Jun 5, 1984

Filed:

Jul 25, 1980

Appl. No.:

6/172055

Inventors:

Frederick E. Heinemann - Canton MA
Thomas D. Gavin - Harvard MA

Assignee:

W. R. Grace & Co. - Cambridge MA

International Classification:

B41N 900

US Classification:

101426

Abstract:

A method of making-up offset printing cylinders having lock-ups positioned in gaps in the cylinders by use of a two piece system involving adhering a compressible printing element to the cylinder with at least one edge extending into the lock-up gap, trimming the edge extending into the lock-up gap, thereafter pulling a non-compressible printing element carrying the printing ink indicia receptive working surface taut over the compressible printing element and securing the ends of the non-compressible printing element in the lock-up under tension. The two piece system involves separating the relatively thick compressible portion of the offset printing blanket from the relatively thinner ink transfer surface of the offset printing blanket. Also a separate embodiment with pressure sensitive adhesive securing the two piece system together and not limited to offset printing cylinders, product and method.