Patent · US Expired

Film forwarding means

US3984851A · kind A · utility

5Cited by
3References
3Claims
0Family size

Assignee

Inventor

Key dates

Filing dateMay 30, 1975
Grant dateOct 5, 1976
Priority date—
Expiry dateMay 30, 1995

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG03B17/52
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A film forwarding means comprising film engagement means reciprocally slidable between initial and terminal positions, actuation means moveable between initial and terminal positions and able to cause forward movement of the engagement means, and rotary drive means for driving the actuation means. The engagement means may not change direction while travelling between its initial and terminal positions, but the actuation means may be moved independently of the engagement means if contacted by the drive means during return to its initial position, whereby stopping position of the drive means between successive film exposures is not critical.

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