US3830278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Canvas stretcher
Assignee: Individual
•
Filing: 1973-10-01
•
Granted: 1974-08-20
•
Expires: 1993-10-01
Abstract
Abstract A modular stretcher to which sheets of canvas may be secured with staples or like fasteners, includes elongated members having a substantially L-shaped cross section and brackets connecting the ends of the members. Each elongated member includes on its outer surface a longitudinally extending groove for supporting a fastener-receiving strip. The inner corner of each member includes a longitudinally extending channel for accommodating an edge of a bracket. The brackets are connected to the members by bolts passing through holes in the bracket and holes in the member. The stretcher may be further strengthened with a cross bracing arrangement connected to the elongated members.
Inventors
- 👤 L Packer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:05
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/18; B44D3/185
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
61 words
A stretcher to which canvas may be secured with nail-type fasteners, comprising: a plurality of elongated members formed of material substantially impenetrable by said fasteners; strips of material which are readily penetrable by said fasteners and which can hold said fasteners; means for mounting said strips on said elongated members; and means for connecting the members together into a framelike structure.
Claim 2
Dependent Claim
61 words
A stretcher to which canvas may be secured with nail-type fasteners, comprising: a plurality of elongated members formed of material substantially impenetrable by said fasteners; strips of material which are readily penetrable by said fasteners and which can hold said fasteners; means for mounting said strips on said elongated members; and means for connecting the members together into a framelike structure.
Claim 3
Dependent Claim
28 words
A stretcher as defined in claim 1 wherein said means for mounting said strips include a groove in the surface of said elongated member for accommodating said strip.
Claim 4
Dependent Claim
19 words
A stretcher as defined in claim 2 wherein the groove extends along the entire length of the elongated member.
Claim 5
Dependent Claim
66 words
A stretcher as defined in claim 1 wherein each of said elongated members includes a channel extending longitudinally along one side of the member, and a hole extending from the channel through said one side; and wherein said means for connecting the members together includes a bracket having at least one hole, and means extending through said holes for fastening the bracket to the elongated member.
Claim 6
Dependent Claim
41 words
A stretcher as defined in claim 1 wherein each of said elongated members has a substantially L-shaped cross-section, and said connecting means includes a bracket, the inner corner of the member having a channel for accommodating an edge of the bracket.
Claim 7
Dependent Claim
36 words
A stretcher as defined in claim 1 wherein each of said elongated members has a substantially L-shaped cross-section defining two mutually perpendicular outer surfaces, one of said strips being carried by each of said outer surfaces.
Claim 8
Dependent Claim
22 words
A stretcher as defined in claim 6 including a groove in each of said outer surfaces for accommodating one of said strips.
Claim 9
Dependent Claim
34 words
A stretcher as defined in claim 1 wherein adjacent ends of two of said elongated members are mitered, and said connecting means includes a plate-like triangular-shaped bracket fitting into the angle between said members.
Claim 10
Dependent Claim
47 words
A stretcher as defined in claim 1 wherein adjacent ends of two of said elongated members are square cut and butted together, and said connecting means includes a plate-like bracket extending across the butted edges and means for fastening said bracket to both of said elongated members.
Claim 11
Dependent Claim
22 words
A stretcher as defined in claim 1 including a cruciform brace, and bracing members extending from said brace to said elongated members.
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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |