US3840196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for anchoring leaders of flexible strips in the cores of reels or the like
Assignee: Individual
•
Filing: 1973-04-09
•
Granted: 1974-10-08
•
Expires: 1993-04-09
Abstract
Abstract A reel for convoluted magnetic tape or the like has a core provided with an eccentric axially parallel hole and a slot which extends from the hole to the periphery of the core. The hole receives a split anchoring ring consisting of springy material and having a tendency to expand so as to move its external surface into frictional engagement with the surface surrounding the hole. The ring has an axially parallel mouth flanked by two prongs which can be moved toward each other to contact the ring so that the latter can be rotated in order to move its mouth into register with the slot. Upon introduction of the leader of a tape into the interior of the ring by way of the slot and the mouth, the operator can anchor the leader in the core with a force of desired magnitude by rotating the ring through a fraction of a single revolution or through one or more revolutions to thus convolute the leader around the ring. The convoluted portion of the leader is clamped between the core and the external surface of the ring as soon as the latter is allowed to expand. The prongs can pinch the leader while the ring rotates in the hole.
Inventors
- 👤 S Presentey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:20
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/18; B65H75/28; G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/67; G11B15/674; B65H2301/00; B65H2301/40; B65H2301/41; B65H2301/414; B65H2301/41419; B65H2301/41422; B65H2301/414225
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
248 words
A device for storing, collecting and dispensing convoluted strips of magnetic tape, photographic film or the like, comprising a rotary core having a periphery provided with a generally axially extending slot, a chamber inwardly adjacent to said periphery and communicating with said slot, and an internal surface bounding said chamber, said surface being concave at least in the region of said slot; and a springy annular anchoring member having an external surface adjacent to said internal surface and a substantially axially extending slit, said core and said member being turnable relative to each other to move said slit into and out of register with said slot and said member having a tendency to expand radially to thereby urge said external surface into frictional engagement with said internal surface, said member being contractible to establish between said surfaces a clearance for reception of a portion of a strip whose leader is inserted into said member by way of said slot and said slit while the latter registers with said slot whereby said portion of the strip is automatically held against withdrawal from Said core in response to turning of said member and core relative to each other to move said slit out of register with said slot and subsequent expansion of said member in said chamber, said turning of said core and said member relative to each other while the leader extends into said member through said slit causing said portion of the strip to enter between said surfaces.
Claim 2
Independent Claim
248 words
A device for storing, collecting and dispensing convoluted strips of magnetic tape, photographic film or the like, comprising a rotary core having a periphery provided with a generally axially extending slot, a chamber inwardly adjacent to said periphery and communicating with said slot, and an internal surface bounding said chamber, said surface being concave at least in the region of said slot; and a springy annular anchoring member having an external surface adjacent to said internal surface and a substantially axially extending slit, said core and said member being turnable relative to each other to move said slit into and out of register with said slot and said member having a tendency to expand radially to thereby urge said external surface into frictional engagement with said internal surface, said member being contractible to establish between said surfaces a clearance for reception of a portion of a strip whose leader is inserted into said member by way of said slot and said slit while the latter registers with said slot whereby said portion of the strip is automatically held against withdrawal from Said core in response to turning of said member and core relative to each other to move said slit out of register with said slot and subsequent expansion of said member in said chamber, said turning of said core and said member relative to each other while the leader extends into said member through said slit causing said portion of the strip to enter between said surfaces.
Claim 3
Dependent Claim
16 words
A device as defined in claim 1, wherein at least one of said surfaces is roughened.
Claim 4
Independent Claim
200 words
A device for storing, collecting and dispensing convoluted strips of magnetic tape, photographic film or the like, comprising a rotary core having a periphery provided with a generally axially extending slot, a chamber inwardly adjacent to said periphery and communicating with said slot, and an internal surface bounding said chamber, said surface being concave at least in the region of said slot; and a springy split ring having an external surface adjacent to said internal surface, said split ring having a tendency to expand radially to thereby urge said external surface into frictional engagement with said internal surface and being contractible to establish said surfaces a clearance for reception of the leader of a strip which is inserted into said chamber by way of said slot whereby the leader is automatically held against withdrawal from said chamber in response to expansion of said split ring, said split ring having an axially parallel mouth and a pair of projections which flank said mouth and are spaced apart at least when said external surface engages said internal surface, said projections being movable toward each other to thereby move said external surface away from said internal surface and to thus establish said clearance.
Claim 5
Independent Claim
200 words
A device for storing, collecting and dispensing convoluted strips of magnetic tape, photographic film or the like, comprising a rotary core having a periphery provided with a generally axially extending slot, a chamber inwardly adjacent to said periphery and communicating with said slot, and an internal surface bounding said chamber, said surface being concave at least in the region of said slot; and a springy split ring having an external surface adjacent to said internal surface, said split ring having a tendency to expand radially to thereby urge said external surface into frictional engagement with said internal surface and being contractible to establish said surfaces a clearance for reception of the leader of a strip which is inserted into said chamber by way of said slot whereby the leader is automatically held against withdrawal from said chamber in response to expansion of said split ring, said split ring having an axially parallel mouth and a pair of projections which flank said mouth and are spaced apart at least when said external surface engages said internal surface, said projections being movable toward each other to thereby move said external surface away from said internal surface and to thus establish said clearance.
Claim 6
Dependent Claim
26 words
A device as defined in claim 1, wherein said chamber is parallel to the axis of said core and said internal surface is a cylindrical surface.
Claim 7
Dependent Claim
63 words
A device as defined in claim 3, wherein said anchoring member is turnable in said chamber to move said mouth into and out of register with said slot whereby a strip whose leader is introduced into the interior of said anchoring member by way of said mouth can be convoluted around said member in response to rotation of said member in said chamber.
Claim 8
Dependent Claim
39 words
A device as defined in claim 5, wherein said projections are movable sufficiently close to each other to pinch the leader of a strip which is inserted into said anchoring member by way of said slot and said mouth.
Claim 9
Dependent Claim
21 words
A device as defined in claim 5, wherein said projections extend substantially radially inwardly toward the center of said anchoring member.
Claim 10
Dependent Claim
15 words
A device as defined in claim 1, wherein said anchoring member consists of nonmagnetic material.
Claim 11
Dependent Claim
17 words
A device as defined in claim 1, wherein said chamber is an eccentric axially parallel cylindrical hole.
Claim 12
Dependent Claim
44 words
A device as defined in claim 1, wherein said chamber is an axially parallel hole in said core and is open at one or both ends thereof, the axial length of said anchoring member being equal to or approximating the length of said hole.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |