Patent US3620472A successfully refreshed from Google Patents.
US3620472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System adapted to grasp the end of a wound strip
Assignee: Paillard SA
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Filing: 1969-02-25
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Granted: 1971-11-16
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Expires: 1989-02-25
Abstract
Abstract The system is adapted to grasp the end of the outer convolution of a wound film, tape or the like strip. To this end it resorts to one or preferably two movable, spaced-apart members such as belts or pulleys engaging the periphery of the wound strip so that the relative difference in speed between the two members at their portions engaging said periphery urges the strip passing across the gap between the two members into said gap to form a slight bulge. When the end of the outer convolution reaches a position facing said gap, it passes over the bulge and is urged outwardly through the gap and away from the grasping system.
Inventors
- 👤 Jean Thevenaz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:02
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/67; G11B15/672; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/43
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
164 words
A system for grasping the end of a kinematographic film, a magnetic tape and similar wound strips, comprising a pair of spaced-apart grasping members forming a gap therebetween, each supported on an arm and having end portions adjacent the periphery of the outer convolution of said wound strip, means driving said grasping members, means moving said end portions into frictional engagement with said wound strip, means pivotally mounting one said support arm, and spring means resiliently urging the end portion of said grasping member on said pivotally mounted arm into engagement with said outer convolution whereby, a differential frictional driving force is applied to said outer convolution as said end portions of said grasping members engage the strip and said pivotally mounted arm is displaced against the force of said spring means by said outer convolution to permit the grasping member on the other of said arms to direct the free end of said outer convolution into the gap between said spacedapart grasping members.
Claim 2
Independent Claim
164 words
A system for grasping the end of a kinematographic film, a magnetic tape and similar wound strips, comprising a pair of spaced-apart grasping members forming a gap therebetween, each supported on an arm and having end portions adjacent the periphery of the outer convolution of said wound strip, means driving said grasping members, means moving said end portions into frictional engagement with said wound strip, means pivotally mounting one said support arm, and spring means resiliently urging the end portion of said grasping member on said pivotally mounted arm into engagement with said outer convolution whereby, a differential frictional driving force is applied to said outer convolution as said end portions of said grasping members engage the strip and said pivotally mounted arm is displaced against the force of said spring means by said outer convolution to permit the grasping member on the other of said arms to direct the free end of said outer convolution into the gap between said spacedapart grasping members.
Claim 3
Dependent Claim
21 words
A system as claimed in claim 1, wherein said driving means includes meshed elements moving said grasping members in opposite directions.
Claim 4
Dependent Claim
34 words
A system as claimed in claim 1, wherein at least one of said pair of members comprises a belt, said system including two pulleys engaging said belt, one of said pulleys driving said belt.
Claim 5
Dependent Claim
77 words
A system as claimed in claim 1, wherein each said member comprises a belt extending substantially in parallelism with each other, the system further including two pulleys engaging each belt, a support for the two pulleys of one of the belts and means for yieldingly connecting the pulleys cooperating with the other belt with said support whereby said other belt exerts on the wound strip a pressure which is less than that exerted by the first-mentioned belt.
References Cited (Backward Citations)
US3454961A
Cited
US3429518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |