US3878574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sleeping bag and method of fabricating same
Assignee: North Face Inc
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Filing: 1973-09-24
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Granted: 1975-04-22
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Expires: 1993-09-24
Abstract
Abstract A sleeping bag has an outside cover formed of two longitudinal halves seamed together along a longitudinal seam which is preferably overlocked and ''''clean finished''''. One edge of each of a plurality of ''''block baffle''''short parallelogram meshes is sewn into the longitudinal seam. Sewn transversely at spaced intervals to the inside surface of the outside cover are the edges of each of a plurality of transverse baffles which are also sewn to the side edges of the block baffles. The inside cover is seamed also in a preferably overlocked longitudinal stitch and hence does not irritate the wearer. The free edge of each transverse baffle is sewn to the inside cover and the free edge of each block baffle is stitched to the longitudinal stitch of the inside cover. This forms a plurality of transverse filler chambers, each chamber blocked at its center by a block baffle. In a modified form of the invention, the block baffle is a single piece of material seamed to the longitudinal seams of the inside and outside covers and the transverse baffles each consist of two halves having their inner ends joined to the block baffle. In a preferred form of the invention, a first draft flap is sewn to the inside surface of the inside cover and to one edge of one slide fastener fabric; and optionally, a second draft flap is sewn to the inside cover and one edge of the other slide fastener fabric. The filler chambers are then pneumatically filled with down or other insulation. The slide fastener fabric edges are sewn closed to the outside cover edges, also closing off the filler chambers. A foot section may be added. A net baffle is sewn to the circumference of the foot section assembly. The outside cover of the foot section is sewn circumferentially to both halves of the outside cover and the inside cover is likewise sewn circumferentially to both joined halves of the inside cover. In each instance, the seam allowances are turned in so as not to be visible to the user and the seams do not irritate the feet.
Inventors
- 👤 Mark E Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:54
CPC Classifications
A; A47; A47G; A47G9/00; A47G9/08; A47G9/086
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
273 words
A method of forming a multi-chambered sleeping bag comprising providing a first and a second half of a first cover, forming a first seam joining said first and second halves together along a longitudinal margin of each said first and second halves while attaching to said first seam a first edge of a block baffle positioned along said first seam; providing a third and fourth half of a second cover, congruent to said first and second half, respectively, forming a second seam joining said third and fourth halves together along a longitudinal margin of each of said third and fourth halves; providing a plurality of transverse baffles, attaching a first longitudinal edge of each said transverse baffle transversely across at least one half of said first cover, attaching second and third edge of ends of said block baffle to adjacent transverse baffles where said transverse baffles cross said first seam; attaching a second longitudinal edge of each said transverse baffles transversely across said second cover, attaching a fourth edge of said block baffle to said second seam; providing a fastener having first and second fastener strips, attaching a first edge of each said fastener strip to a second longitudinal edge of each of said first and second halves; inserting heat insulation material into the transverse filler chambers formed by said covers and said baffles through openings along the second longitudinal edges of said first and third halves and said second and fourth halves, and attaching a second edge of each said fastener strip to a second longitudinal edge of said third and fourth halves to close off said openings of said filler chambers.
Claim 2
Independent Claim
273 words
A method of forming a multi-chambered sleeping bag comprising providing a first and a second half of a first cover, forming a first seam joining said first and second halves together along a longitudinal margin of each said first and second halves while attaching to said first seam a first edge of a block baffle positioned along said first seam; providing a third and fourth half of a second cover, congruent to said first and second half, respectively, forming a second seam joining said third and fourth halves together along a longitudinal margin of each of said third and fourth halves; providing a plurality of transverse baffles, attaching a first longitudinal edge of each said transverse baffle transversely across at least one half of said first cover, attaching second and third edge of ends of said block baffle to adjacent transverse baffles where said transverse baffles cross said first seam; attaching a second longitudinal edge of each said transverse baffles transversely across said second cover, attaching a fourth edge of said block baffle to said second seam; providing a fastener having first and second fastener strips, attaching a first edge of each said fastener strip to a second longitudinal edge of each of said first and second halves; inserting heat insulation material into the transverse filler chambers formed by said covers and said baffles through openings along the second longitudinal edges of said first and third halves and said second and fourth halves, and attaching a second edge of each said fastener strip to a second longitudinal edge of said third and fourth halves to close off said openings of said filler chambers.
Claim 3
Independent Claim
273 words
A method of forming a multi-chambered sleeping bag comprising providing a first and a second half of a first cover, forming a first seam joining said first and second halves together along a longitudinal margin of each said first and second halves while attaching to said first seam a first edge of a block baffle positioned along said first seam; providing a third and fourth half of a second cover, congruent to said first and second half, respectively, forming a second seam joining said third and fourth halves together along a longitudinal margin of each of said third and fourth halves; providing a plurality of transverse baffles, attaching a first longitudinal edge of each said transverse baffle transversely across at least one half of said first cover, attaching second and third edge of ends of said block baffle to adjacent transverse baffles where said transverse baffles cross said first seam; attaching a second longitudinal edge of each said transverse baffles transversely across said second cover, attaching a fourth edge of said block baffle to said second seam; providing a fastener having first and second fastener strips, attaching a first edge of each said fastener strip to a second longitudinal edge of each of said first and second halves; inserting heat insulation material into the transverse filler chambers formed by said covers and said baffles through openings along the second longitudinal edges of said first and third halves and said second and fourth halves, and attaching a second edge of each said fastener strip to a second longitudinal edge of said third and fourth halves to close off said openings of said filler chambers.
Claim 4
Independent Claim
273 words
A method of forming a multi-chambered sleeping bag comprising providing a first and a second half of a first cover, forming a first seam joining said first and second halves together along a longitudinal margin of each said first and second halves while attaching to said first seam a first edge of a block baffle positioned along said first seam; providing a third and fourth half of a second cover, congruent to said first and second half, respectively, forming a second seam joining said third and fourth halves together along a longitudinal margin of each of said third and fourth halves; providing a plurality of transverse baffles, attaching a first longitudinal edge of each said transverse baffle transversely across at least one half of said first cover, attaching second and third edge of ends of said block baffle to adjacent transverse baffles where said transverse baffles cross said first seam; attaching a second longitudinal edge of each said transverse baffles transversely across said second cover, attaching a fourth edge of said block baffle to said second seam; providing a fastener having first and second fastener strips, attaching a first edge of each said fastener strip to a second longitudinal edge of each of said first and second halves; inserting heat insulation material into the transverse filler chambers formed by said covers and said baffles through openings along the second longitudinal edges of said first and third halves and said second and fourth halves, and attaching a second edge of each said fastener strip to a second longitudinal edge of said third and fourth halves to close off said openings of said filler chambers.
Claim 5
Dependent Claim
32 words
The method of claim 1 in which each said step of forming a seam comprises forming an overlock ''''clean finish'''' seam whereby in the completed bag neither of said seams is exposed.
Claim 6
Dependent Claim
91 words
The method of claim 1 which further comprises providing a draft flap consisting of a substantially rectangular piece of fabric, stitching a first longitudinal edge of said fabric to said third half along a line spaced about 2 inches from said second longitudinal edge prior to said step of attaching said first edge of said fastener strip and attaching a second longitudinal edge of said fabric to said third half by the same stitching as that by which said second edge of said fastener strip is aTtached to said third half.
Claim 7
Dependent Claim
87 words
The method of claim 1 which further comprises providing an inner and outer foot cover and a foot baffle, attaching one edge of said foot baffle to the perimeter of said inner foot cover and a second edge of said foot baffle to the perimeter of said outer foot cover, attaching the perimeter of said inner foot cover to one transverse end of said first and second halves, and attaching the perimeter of said outer foot cover to one transverse end of said third and fourth halves.
Claim 8
Dependent Claim
77 words
The method of claim 1 in which said block baffle comprises a plurality of short block baffles arranged end-to-end along said first seam and in which each said transverse baffle is unitary, said first-mentioned attaching step comprising sewing said short block baffles end-to-end along said first seam, said second-mentioned attaching step comprising sewing a second and third edge of each said short block baffle to said adjacent transverse baffles where said transverse baffles cross said block baffles.
Claim 9
Dependent Claim
65 words
The method of claim 1 in which said block baffle is unitary and each said transverse baffle has two parts, one for each half of said bag, said first-mentioned attaching step comprising sewing one longitudinal edge of said block baffle to said first seam, said second-mentioned attaching step comprising sewing the inner end of each part of each said transverse baffle to said block baffle.
Claim 10
Dependent Claim
203 words
A sleeping bag comprising an outside cover having first and second halves, a first seam joining said first and second halves together along a longitudinal margin of said first and second halves, an inside cover having third and fourth halves congruent to said first and second halves, respectively, a second seam joining said third and fourth halves together along a longitudinal margin of said third and fourth halves, a plurality of parallel, elongated, rectangular transverse baffles, each said transverse baffle having one longitudinal edge attached to said outside cover and the opposite longitudinal edge attached to said inside cover, a block baffle, said block baffle having a first edge attached to said first seam, a second edge opposite said first edge attached to said second seam, said block baffle having third and fourth edges each attached to one said transverse baffle, said covers and baffles defining a plurality of filler chambers, heat insulation material in said filler chambers, a rectangular fastener strip having one longitudinal edge attached to the edge of said first and third halves opposite said first seam and a second longitudinal edge of said fastener strip attached to the edges of said second and fourth halves opposite said first seam.
Claim 11
Dependent Claim
203 words
A sleeping bag comprising an outside cover having first and second halves, a first seam joining said first and second halves together along a longitudinal margin of said first and second halves, an inside cover having third and fourth halves congruent to said first and second halves, respectively, a second seam joining said third and fourth halves together along a longitudinal margin of said third and fourth halves, a plurality of parallel, elongated, rectangular transverse baffles, each said transverse baffle having one longitudinal edge attached to said outside cover and the opposite longitudinal edge attached to said inside cover, a block baffle, said block baffle having a first edge attached to said first seam, a second edge opposite said first edge attached to said second seam, said block baffle having third and fourth edges each attached to one said transverse baffle, said covers and baffles defining a plurality of filler chambers, heat insulation material in said filler chambers, a rectangular fastener strip having one longitudinal edge attached to the edge of said first and third halves opposite said first seam and a second longitudinal edge of said fastener strip attached to the edges of said second and fourth halves opposite said first seam.
Claim 12
Dependent Claim
28 words
A bag according to claim 7 in which said first and second seams are overlocked ''''clean finish'''' seams whereby said seams are not exposed in the completed bag.
Claim 13
Dependent Claim
15 words
A bag according to claim 7 in which said fastener strip is a slide fastener.
Claim 14
Dependent Claim
29 words
A bag according to claim 7 in which said block baffle comprises a plurality of short quadrilateral sections each having second and third edges attached to adjacent transverse baffles.
Claim 15
Dependent Claim
40 words
A bag according to claim 7 in which said block baffle is unitary and each said transverse baffle has two parts, each part in one half of said bag, the inner edge of each part sewn to said block baffle.
Claim 16
Dependent Claim
64 words
A bag according to claim 7 which further comprises at least one draft flap formed of an elongated rectangular piece of fabric, one longitudinal edge of said fabric being attached to said third half along a line spaced about 2 inches from said fastener strip and the opposite longitudinal edge of said fabric being attached to said third half and to said fastener strip.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |