Patent · US Expired

Spool for strip-form recording substrates, in particular for photographic films

US4984751A · kind A · utility

8Cited by

6References

4Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Franz Hoffacker · Langenfeld, DE
Guido Kovacic · Unkel, DE
Hermann Luhrig · Leverkusen, DE

Key dates

Filing date	Dec 13, 1985
Grant date	Jan 15, 1991
Priority date	—
Expiry date	Dec 13, 2005

Classification

Technology area (CPC G)Physics
CPC primaryG03B2217/261
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A spool for strip-form recording substrates, in particular for photographic films, with a slit arranged in the spool core and means arranged therein for fixing the strip end inserted into the slit, and with transitional surfaces which are rounded in the approximate shape of a cylinder surface on the inlet side between the axially running upper and lower slit surfaces and the external surfaces of the spool core, which are arranged in kink-free manner between the adjacent surfaces of the spool core and each form an arc portion of more than 90.degree. in cross section, the radius thereof being at least one third of the radius of the spool core.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.