US3735451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seam for paper felts
Assignee: Scapa Inc
•
Filing: 1971-10-14
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Granted: 1973-05-29
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Expires: 1991-10-14
Abstract
Abstract A clipper seam wherein the hooks for joining the ends of felts are arranged in alternating groups such that a limited number of hooks will be brought into rubbing engagement by lateral shifting or bowing of the ends of the felts.
Inventors
- 👤 J Haythornthwaite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:24
CPC Classifications
F; F16; F16G; F16G3/00; F16G3/02; F16G3/04; Y; Y10; Y10T; Y10T24/00; Y10T24/16; Y10T24/1608; Y10T24/1636
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
181 words
A clipper seam for hingedly joining the adjacent ends of dryer felts comprising groups of wire connectors in which the wires in each group are closely adjacent and the groups alternate from opposite sides of the seam, each wire connector having a loop and a long and short leg terminating in hooks, said wire connectors being secured to the adjacent ends of the felt with the legs disposed in engagement with the opposite surfaces at the ends and the hooks buried in the ends and with the loops prOjecting from the ends in overlapping relation from opposite sides of the seam such that the centers of the loops lie along a common line transversely of the web midway between the ends and collectively define a transverse passage in which is mounted a flexible hinge element, and wherein the loops are arranged in groups of three, alternating from first one end and then the other and wherein the connector wires in each group are set in uniformly closely spaced parallel relation to each other and perpendicular to the plane of the felt.
Claim 2
Dependent Claim
181 words
A clipper seam for hingedly joining the adjacent ends of dryer felts comprising groups of wire connectors in which the wires in each group are closely adjacent and the groups alternate from opposite sides of the seam, each wire connector having a loop and a long and short leg terminating in hooks, said wire connectors being secured to the adjacent ends of the felt with the legs disposed in engagement with the opposite surfaces at the ends and the hooks buried in the ends and with the loops prOjecting from the ends in overlapping relation from opposite sides of the seam such that the centers of the loops lie along a common line transversely of the web midway between the ends and collectively define a transverse passage in which is mounted a flexible hinge element, and wherein the loops are arranged in groups of three, alternating from first one end and then the other and wherein the connector wires in each group are set in uniformly closely spaced parallel relation to each other and perpendicular to the plane of the felt.
Claim 3
Dependent Claim
16 words
A clipper seam according to claim 1, wherein the groups of wire hooks are uniformly spaced.
Claim 4
Dependent Claim
37 words
A clipper seam according to claim 1, wherein the flexible hinge element is comprised of a pair of lacing wires, the combined diameters of which do not exceed the diameter of the passage constituted by said loops.
Claim 5
Dependent Claim
29 words
A clipper seam according to claim 1, wherein the groups of hooks are uniformly spaced with the spacing between groups greater than the distance between hooks within the groups.
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |