Title: Spooling arrangements for endless band material

Abstract: An arrangement for spooling endless band material, particularly for the repeated projection of the full length of cinematograph film required for a complete programme formed as an endless loop, having two double spools each able to carry two film spirals. In a first half of the projection operation Spool 1, Spiral 1, is fed through the projector and taken up as Spool 2, Spiral 1. Simultaneously, Spool 1, Spiral 2, is directly rewound as Spool 2, Spiral 2. Both spools are then reversed and, in the second half of the projection operation, Spool 2, Spiral 2, is fed through the projector and taken up as Spool 1, Spiral 2, and Spool 2, Spiral 1, is directly rewound as Spool 1, Spiral 1. The initial state is re-established and the projection operation is continuously repeatable without rethreading the projector.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Robertson, Penrose David (London, EN)

Application Number: 565170
Filing Date: 1975-04-04
Publication_date: 1976-09-21
Assignee: Westrex Limited (London, EN)
Primary Class(es): 352/125 242/325.1, 352/128
Other Classes:
US Patent Ref:

1759024

May, 1930

Selbach

242/55.

Other Refs:
Primary Examiner: Hayes, Monroe H.
Assistant Examiner:
Attorney: Ellingsberg; Donald J.