Patent US3620469A successfully refreshed from Google Patents.
US3620469A
Expired / Lapsed
US
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Device for attaching a flexible strip to a reel for winding thereon
Assignee: Agfa Gevaert AG
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Filing: 1970-07-22
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Granted: 1971-11-16
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Expires: 1990-07-22
Abstract
Abstract A device for attaching a flexible strip to a reel includes a wedge assembly and a dovetailed slot in the hub of the reel. The preliminary wedge assembly includes a central plug attached cornerwise to a pair of spaced wedges by frangible and flexible webs. Downward pressure of the assembly in the strip urges it into the slot and further downward pressure on the plug breaks the webs and forces the plug between the tapered wedges to urge them apart and lock them under the undercut corners of the slot. The flexible strip is thereby secured under the frictionally locked wedge assembly within the dovetailed slot. The preliminary wedge assembly is conveniently molded of a synthetic plastic material such as polyethylene.
Inventors
- 👤 Anton Riedel
- 👤 Max Nissl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:06
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/041; G11B23/044; G11B15/00; G11B15/60; G11B15/66; G11B15/67; G11B15/674
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
91 words
A device for attaching a flexible strip to a reel comprising a cylindrical hub on said reel, a dovetailed slot in said hub having a pair of undercut corners on both sides of a base, a pair of tapered wedges disposed within said slot adjacent said undercut corners, said strip being disposed within said slot under said tapered wedges, and a substantially rectangular plug in said slot snugly disposed between said tapered wedges whereby said tapered wedges are secured against said undercut corners and said strip is secured in said slot.
Claim 2
Independent Claim
91 words
A device for attaching a flexible strip to a reel comprising a cylindrical hub on said reel, a dovetailed slot in said hub having a pair of undercut corners on both sides of a base, a pair of tapered wedges disposed within said slot adjacent said undercut corners, said strip being disposed within said slot under said tapered wedges, and a substantially rectangular plug in said slot snugly disposed between said tapered wedges whereby said tapered wedges are secured against said undercut corners and said strip is secured in said slot.
Claim 3
Dependent Claim
61 words
A device as set forth in claim 1 wherein each of said tapered wedges have one substantially right angular bottom corner disposed against said undercut corners of said slot and have an acute angular opposite bottom corner whereby said tapered wedges are securely locked between said plug and said undercut corners of said slot with reduced creasing action on said strip.
Claim 4
Dependent Claim
47 words
A device as set forth in claim 1 wherein the top corners of said tapered wedges at the edge of said slot and adjacent said plug are respectively obtuse and acute angular to provide a substantially smooth continuation of said hub for winding said strip over it.
Claim 5
Independent Claim
112 words
A device for attaching a flexible strip to a reel with a cylindrical hub having a dovetailed slot therein, said device comprising a pair of tapered wedges for disposition within said slot, said tapered wedges having narrow tops and wide bottoms, said tapered wedges being spaced apart and disposed substantially parallel to each other, a substantially rectangular plug, said plug being disposed adjacent said spaced wedges with the corners of one of its sides being disposed adjacent the spaced corners of the narrow tops of said wedges, and frangible webs connecting adjacent corners of said plug and said wedges whereby said device is maintained assembled prior to insertion within said dovetailed slot.
Claim 6
Independent Claim
112 words
A device for attaching a flexible strip to a reel with a cylindrical hub having a dovetailed slot therein, said device comprising a pair of tapered wedges for disposition within said slot, said tapered wedges having narrow tops and wide bottoms, said tapered wedges being spaced apart and disposed substantially parallel to each other, a substantially rectangular plug, said plug being disposed adjacent said spaced wedges with the corners of one of its sides being disposed adjacent the spaced corners of the narrow tops of said wedges, and frangible webs connecting adjacent corners of said plug and said wedges whereby said device is maintained assembled prior to insertion within said dovetailed slot.
Claim 7
Dependent Claim
28 words
A device as set forth in claim 4 wherein the outer sides of said wedges are disposed parallel to each other whereby insertion in said slot is facilitated.
Claim 8
Dependent Claim
42 words
A device as set forth in claim 5 wherein the bottom outside corners of said wedges are substantially right angular and the inner bottom corners of said tapered wedges are acute angular whereby insertion and locking in said dovetailed slot is facilitated.
Claim 9
Dependent Claim
35 words
A device as set forth in claim 6 wherein the top outside corners of said tapered wedges are obtuse angular to provide a substantially smooth continuation of said hub when inserted in said dovetailed slot.
Claim 10
Dependent Claim
58 words
A device as set forth in claim 4 wherein the distance across the spaced tops of said tapered wedges is substantially equal to the opening to said slot and the sum of the assembled widths of the bottoms of said tapered wedges and the adjacent side of said plug being substantially equal to the base of said slot.
Claim 11
Dependent Claim
56 words
A device as set forth in claim 4 wherein the outer sides of said tapered wedges are disposed substantially parallel to each other and the inner adjacent sides of said tapered wedges are inclined toward each other from the connected corners of said wedges to the free adjacent corners of said wedges remote from said webs.
Claim 12
Dependent Claim
63 words
A device as set forth in claim 9 wherein the outer corners of said wedges adjacent said corners connected by said webs to said plug Are obtuse angular and said corners of said wedges connected by said webs are acute angular, whereby the exposed surfaces of said wedges and said plug after insertion and engagement form a substantially smooth continuation of said hub.
Claim 13
Dependent Claim
31 words
A device as set forth in claim 10 wherein the surfaces of said wedges between said obtuse and acute angular corners are slightly curved to help form said substantially smooth continuation.
Claim 14
Dependent Claim
26 words
A device as set forth in claim 11 wherein said obtuse and acute angular corners are smoothly curved to also help form said substantially smooth continuation.
References Cited (Backward Citations)
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 |