Patent US3819129A successfully refreshed from Google Patents.
US3819129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for taking up the end of a wound tape
Assignee: Bolex International SA
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Filing: 1972-02-17
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Granted: 1974-06-25
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Expires: 1992-02-17
Abstract
Abstract First and second rotary members are independently mounted on a support arm and can be brought into contact with the outer periphery of a tape wound on a spool. The first member is rotatably driven and the second member elastically applied against the first member, so that it is driven in the opposite direction, the parts of the members adjacent the wound tape tending move in direction towards one another. The second member is applied against the wound tape by a substantially different force than is the first member, for example a greater force, so that the second member drives the wound tape and brake means intermittently acting on the tape spool ensures that the outer spiral of tape is loosened. When the free end of the loosened tape leaves the second member it is driven in the opposite direction by the first member and is taken up by a grooved surface on the second member which guides it between the first and second members, the tape then actuating means to disengage the second member from driving contact with the first member, so that when the tape end is extracted, the tape is driven solely by the first member and the second member is idly driven by the wound tape.
Inventors
- 👤 J Thevenaz
- 👤 W Etter
- 👤 L Thevenaz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:50
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/56
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
247 words
A device for taking up the free end of a wound tape and guiding it through a passageway comprising, a movable support, at least one pulley mounted on said support, a belt for driving said wound tape, said belt passing over said at least one pulley and movable into and out of contact with the periphery of the wound tape, means for driving said belt around said pulley, means for applying the belt against the periphery of the wound tape with a certain bearing force, guide means on said support and on which said at least one pulley is mounted for guiding a part of said belt along a path along which the belt may contact the wound tape, a lever pivotally mounted on said support, first spring means urging said support towards the periphery of said tape with a force substantially independent of said certain bearing force, a member rotatably mounted at one end of said lever, second spring means acting on said lever to urge said rotatable member against said belt whereby said rotatable member is friction driven in a direction opposite to said belt, means on a peripheral surface of said rotatable member for taking up the free end of said tape and directing it between said belt and said rotatable member, and means on said lever for preventing the tape from contacting the rotatable member and thereby causing the belt and the rotatable member to be separated from driving contact with each other.
Claim 2
Independent Claim
247 words
A device for taking up the free end of a wound tape and guiding it through a passageway comprising, a movable support, at least one pulley mounted on said support, a belt for driving said wound tape, said belt passing over said at least one pulley and movable into and out of contact with the periphery of the wound tape, means for driving said belt around said pulley, means for applying the belt against the periphery of the wound tape with a certain bearing force, guide means on said support and on which said at least one pulley is mounted for guiding a part of said belt along a path along which the belt may contact the wound tape, a lever pivotally mounted on said support, first spring means urging said support towards the periphery of said tape with a force substantially independent of said certain bearing force, a member rotatably mounted at one end of said lever, second spring means acting on said lever to urge said rotatable member against said belt whereby said rotatable member is friction driven in a direction opposite to said belt, means on a peripheral surface of said rotatable member for taking up the free end of said tape and directing it between said belt and said rotatable member, and means on said lever for preventing the tape from contacting the rotatable member and thereby causing the belt and the rotatable member to be separated from driving contact with each other.
Claim 3
Dependent Claim
31 words
A device according to claim 1, in which said certain bearing force is such that the rotatable member exerts a greater tractive force on the wound tape than does the belt.
Claim 4
Dependent Claim
43 words
A device according to claim 1, in which said certain bearing force is such that the belt exerts a greater tractive force on the wound tape than does the rotatable member, and including means for intermittently braking a spool carrying the wound tape.
Claim 5
Dependent Claim
171 words
A device according to claim 1, in which the rotatable member is a roller freely mounted on said lever, and said means on said lever for preventing the tape from contacting said rotatable member comprise a pair of discs freely rotatably mounted on said lever, said discs protruding beyond the periphery of said roller in the direction of said belt, the end of the tape being guided between said discs and said belt. 5 A device according to claim 3, in which the means on the support for guiding the belt comprises said at least one pulley mounted about a shaft movably mounted on the support and a second pulley mounted about a shaft fixed to said support, said means for driving the belt about said pulleys forming the means for applying a traction to the belt to move said movably mounted pulley towards the support and apply said part of the belt between the first and second pulleys against the periphery of the wound tape with said certain bearing force.
Claim 6
Independent Claim
197 words
A device for taking up a free end of a wound tape and guiding it along a selected path, comprising first and second rotary members, means for driving the first member in a first direction, a movable support on which said members are independently mounted, said support being movable to bring the members into an operative position at the periphery of the wound tape, means for urging the members towards one another and into driving contact with one another whereby the first member drives the second member in a second direction opposite the first direction, means for differentially urging the first and second members towards the periphery of the wound tape, whereby in the operative position one of the first and second members drives the wound tape in a selected direction, means on the peripheral surface of the second member for taking up the free end of the wound tape and directing said free end between the first and second members, and means on said support adjacent said second member for preventing the tape from contacting the rotatable member and thereby causing the belt and the rotatable member to be separated from driving contact with each other.
Claim 7
Independent Claim
197 words
A device for taking up a free end of a wound tape and guiding it along a selected path, comprising first and second rotary members, means for driving the first member in a first direction, a movable support on which said members are independently mounted, said support being movable to bring the members into an operative position at the periphery of the wound tape, means for urging the members towards one another and into driving contact with one another whereby the first member drives the second member in a second direction opposite the first direction, means for differentially urging the first and second members towards the periphery of the wound tape, whereby in the operative position one of the first and second members drives the wound tape in a selected direction, means on the peripheral surface of the second member for taking up the free end of the wound tape and directing said free end between the first and second members, and means on said support adjacent said second member for preventing the tape from contacting the rotatable member and thereby causing the belt and the rotatable member to be separated from driving contact with each other.
References Cited (Backward Citations)
DE1287437B
Cited
US3620472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |