Title:
CORE FOR PHOTOGRAPHIC SENSITIVE MATERIAL
Document Type and Number:
Japanese Patent JP3255724
Kind Code:
B2
Abstract:
PURPOSE: To prevent scratching or pressure fog even when dust deposits on a core or a winding surface of the core used for photographic sensitive material on which a photographic film or photographic paper is wound.
CONSTITUTION: An outer cylinder 1 and an inner cylinder 4 are formed in one body with an annular plate 2 and libs 3 inside of the outer cylinder 1. The surface of the outer cylinder 1 (winding surface) has a rugged part 5 where almost hemisphere projections are formed in the longitudinal and transverse directions with specified interval. The max. roughness of the rugged part 5 is about ≤40μm and the center line roughness is about 0.1-10μm. The inside of the outer cylinder 1 in the resin injection side has an undercut projection (not shown in the figure) to fix the core for a photographic sensitive material when a movable core is detached. Moreover, this core has a resin injection port 7.
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Inventors:
Mutsuo Akao
Makoto Kawamura
Makoto Kawamura
Application Number:
JP27147892A
Publication Date:
February 12, 2002
Filing Date:
October 09, 1992
Export Citation:
Assignee:
Fuji Photo Film Co., Ltd.
International Classes:
G03C3/00; (IPC1-7): G03C3/00
Domestic Patent References:
| JP3188147A | ||||
| JP62286043A | ||||
| JP57185305A | ||||
| JP4121733A | ||||
| JP3124767A | ||||
| JP54120931U | ||||
| JP219135U | ||||
| JP3505263A |
Attorney, Agent or Firm:
Masahiro Tanaka
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