Patent US3668816A successfully refreshed from Google Patents.
US3668816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for constructing fabric enclosed springs
Assignee: Cone Mills Corp
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Filing: 1970-07-10
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Granted: 1972-06-13
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Expires: 1990-07-10
Abstract
Abstract Web material is folded to form two overlying plies integrally connected along one longitudinal edge for receiving compressed coil springs therebetween. The springs are enclosed within individual pockets formed by sewing the plies transversely between adjacent springs and by adhering longitudinally the plies along one edge portion.
Inventors
- 👤 Lloyd W Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:49
CPC Classifications
B; B65; B65B; B65B9/00; B65B9/06; B65B9/08; B65B9/093; Y; Y10; Y10T; Y10T29/00; Y10T29/48; Y10T29/481
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
Apparatus for producing a series of pockets, having coil springs positioned therein, froM web material folded to form two overlying plies integrally connected along one longitudinal edge comprising; a frame, means for advancing said overlying plies, having a series of spaced coil springs positioned therein, longitudinally of said frame, means displaceable transversely of said overlying plies for forming transverse stitch lines between the coil springs for securing said plies together to define sides of the pockets, and means located adjacent the longitudinal edges of the plies opposite to the integrally connected edge for adhering the plies longitudinally for closing the ends of the pockets.
Claim 2
Dependent Claim
104 words
Apparatus for producing a series of pockets, having coil springs positioned therein, froM web material folded to form two overlying plies integrally connected along one longitudinal edge comprising; a frame, means for advancing said overlying plies, having a series of spaced coil springs positioned therein, longitudinally of said frame, means displaceable transversely of said overlying plies for forming transverse stitch lines between the coil springs for securing said plies together to define sides of the pockets, and means located adjacent the longitudinal edges of the plies opposite to the integrally connected edge for adhering the plies longitudinally for closing the ends of the pockets.
Claim 3
Dependent Claim
44 words
Apparatus as defined in claim 1, wherein the web material is folded such that one ply is wider than the other, said means for adhering the plies longitudinally to close the pockets including means for turning the wider ply to overlap the other ply.
Claim 4
Dependent Claim
25 words
Apparatus as defined in claim 2, said means for adhering the plies further including means for continuously supplying adhesive material to secure the plies longitudinally.
Claim 5
Dependent Claim
47 words
Apparatus as defined in claim 1, wherein said means for advancing the plies includes intermittently actuated feed rolls and wherein said means displaceable transversely of the plies includes a continuously driven sewing head for forming the lines of stitches between the coil springs positioned intermediate the plies.
Claim 6
Dependent Claim
39 words
Apparatus as defined in claim 1, said means for adhering the plies longitudinally including means for supplying adhesive material to the plies along a longitudinal edge portion, and means for applying pressure to the adhesive material and the plies.
Claim 7
Dependent Claim
62 words
Apparatus as defined in claim 1, said means for adhering the plies longitudinally comprising means for dispensing adhesive on one edge on one of said plies, means for turning said edge having adhesive thereon approximately 180 degrees into engagement with the edge of the other of said plies and means for applying pressure to the edges of said plies having adhesive therebetween.
Claim 8
Dependent Claim
25 words
Apparatus as defined in claim 6, wherein said adhesive is applied continuously, and further including means for spreading the adhesive deposited on said one ply.
Claim 9
Independent Claim
81 words
The method of producing a series of pockets having coil springs therein comprising the steps of: advancing a web in a prescribed path of travel, folding the advancing web to form overlying plies of material, inserting successive coil springs between the plies in longitudinally spaced relation, intermittently stitching the plies transversely of the prescribed path of travel and intermediate adjacent spaced springs to form pockets for the springs, and adhesively bonding the plies along longitudinal edge portions to close the pockets.
Claim 10
Independent Claim
81 words
The method of producing a series of pockets having coil springs therein comprising the steps of: advancing a web in a prescribed path of travel, folding the advancing web to form overlying plies of material, inserting successive coil springs between the plies in longitudinally spaced relation, intermittently stitching the plies transversely of the prescribed path of travel and intermediate adjacent spaced springs to form pockets for the springs, and adhesively bonding the plies along longitudinal edge portions to close the pockets.
Claim 11
Dependent Claim
31 words
The method as defined in claim 8, said plies being adhesively bonded by continuously applying adhesive to at least one of the plies subsequent to the transverse stitching of the plies.
Claim 12
Dependent Claim
48 words
The method as defined in claim 8, wherein the web is folded such that the overlying plies are of different widths, and wherein the plies are adhesively bonded by dispensing adhesive on the wider ply and folding the edge of the wider ply to overlap the other ply.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |