Backing for flexographic printing plates

Details Backing for flexographic printing plates Backing for flexographic printing plates

1993-08-25

1994-07-05

Lesmes, George F.

Printing

Printing members

Plate mountings

4283148, 4283155, 4283157, 4283159, 428323, 428327, 428909, 428 40, 428343, B32B 326, B41N 600

Patent

active

053257766

ABSTRACT:
An improved cushioning backing sheet material to be positioned between a flexographic printing cylinder and a flexible printing plate is provided. The backing sheet material has a uniform thickness of about 30 to 60 mils and a density greater than 40 pounds per cubic foot. The backing is sufficiently deformable to experience a reduction in thickness of 6 to 9 percent when subjected to a compressive force of 45 psi and has a resiliency sufficient to recover at least 99.5 percent of its original thickness within 0.1 second after the compressive force is removed.

REFERENCES:
patent: 3428517 (1969-02-01), Grupe et al.
patent: 3795568 (1974-03-01), Rhodarmer et al.
patent: 3903794 (1975-09-01), Grupe et al.
patent: 4112841 (1978-09-01), Deshpande
patent: 4234640 (1980-11-01), Wittel
patent: 4303721 (1981-12-01), Rodriguez
patent: 4574697 (1986-03-01), Feeley
patent: 4771078 (1988-09-01), Schisler et al.
patent: 4871631 (1989-10-01), Pieper et al.
patent: 5015556 (1991-05-01), Martens

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