Patent · US Expired

Film winding spool for photographic camera

US4451011A · kind A · utility

15Cited by

6References

8Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Dieter Engelsmann · Unterhaching, DE
Leo Lippl · Munich, DE
Reinhard Nicko · Munich, DE
Peter Stiefel · Ditzingen, DE
Peter Lermann · Feldkirchen-Westerham, DE

Key dates

Filing date	May 10, 1982
Grant date	May 29, 1984
Priority date	—
Expiry date	May 10, 2002

Classification

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

Abstract

A film winding spool for a photographic camera has an inner cylindrical member driven in rotation and provided with engaging formations for engaging an initial portion of the film, and an outer cylindrical member surrounding the inner member so as to form a space therebetween and having a slot for introducing the initial portion of a film into this space and an outer surface for winding successive coils of the film, wherein the outer member has at least one opening arranged so that a piece of the film separated from a remaining part of the film can be withdrawn from the space between the inner and outer members through the opening.

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