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US 4,533,090 AGranted
Apparatus for tensioning band or web portions running off and onto two rollers
AssigneeArnold & Richter Cine Technik GmbH & Co. Betriebs KG
InventorOtto Blaschek
Life of this patent
Estimating the term…
Abstract
In apparatus for tensioning film strip unwinding from one roller and running onto another roller in a cassette or camera, a D.C. motor is provided of which the armature shaft and/or the stator are freely rotatably mounted. The winding cores of the rollers are placed on the armature shaft and stator.
Claims7
Apparatus for tensioning first and second portions of a strip or web unwinding from a feed roller and winding onto a takeup roller, such as film strip in a film cassette or camera, said apparatus comprising:
- a housing wall;
- a D.C. motor supported in the housing wall and including a stator and an armature shaft, both the stator and the armature shaft being rotatably carried in the housing wall, so that the stator and armature shaft are each rotatable relative to each other and are each rotatable relative to the housing wall;
- first driving connection means extending between and interconnecting the rotatably mounted stator and one of the rollers;
- second driving connection means extending between and interconnecting the rotatably mounted armature shaft and the other of the two rollers;
- and feed means positioned to drivingly contact the strip or web between the rollers for feeding an unrolled third portion of the strip or web in untensioned condition while the first and second portions are in tension.
2 more elements
Dependencies are inferred from the claim text.