Roller for use in a photographic sheet material processing appar

Details Roller for use in a photographic sheet material processing appar Roller for use in a photographic sheet material processing appar

1996-12-12

1998-04-28

Mathews, A. A.

Photography

Fluid-treating apparatus

Having photographic medium feed

396624, 396636, 492 50, G03B 313

Patent

active

057458162

ABSTRACT:
A roller, for use in a photographic sheet material processing apparatus, comprises a core (32) provided with a covering of relatively soft material (34). The roller has a length (L) of from 0.4 to 2.0 m. The core has a maximum diameter (D) of less than 0.04*L m. The roller is characterised by having a deflection as measured by a specific test and a weight (W) below levels defined by a specified boundary condition formulae (1) & (2). Rollers satisfying this condition are characterised in that the core is formed of a composite material comprising fibers and a resin matrix. Such rollers have a relatively small diameter, are light and yet still have sufficient stiffness to avoid substantial wrinkling of the sheet material in the apparatus and to satisfy the requirements of high processing quality.

REFERENCES:
patent: 3593398 (1971-07-01), Hess et al.
patent: 3698053 (1972-10-01), Hess et al.
patent: 3945723 (1976-03-01), Cook et al.
patent: 4158128 (1979-06-01), Evdokimov et al.
patent: 4166689 (1979-09-01), Schausberger et al.
patent: 4616915 (1986-10-01), Norris
patent: 4864343 (1989-09-01), Nelson
patent: 5048441 (1991-09-01), Quigley
patent: 5108878 (1992-04-01), Nakamura
patent: 5324248 (1994-06-01), Quigley
patent: 5583600 (1996-12-01), Kurowawa et al.
Patent Abstracts of Japan JP59003435 (Showa Densen Denran KK).

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