US3757479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mirror
Assignee: KAMAR PRODUCTS Inc
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Filing: 1971-12-27
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Granted: 1973-09-11
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Expires: 1991-12-27
Abstract
Abstract This mirror comprises a frame with an external continuous groove having opposed side undercuts. A flexible strip presses a flexible reflective sheet into the groove to hold said sheet in stretched condition on the frame to provide a smoth mirror surface. The flexible strip is normally of inverted V-shape, with wings that can be pressed down and toward each other to reduce the overall width of the strip to enable the strip to easily enter the groove, and press the reflective sheet into the groove. When the outer edges of the wings of the strip are in the groove, the apex of the strip is pressed down to invert its shape from inverted V-shape to V-shape to tightly press the mirror sheet into the undercuts. The top of the apex of the normal inverted Vshaped strip has a longitudinal slot to limit the inversion of the strip from inverted V-shape to V-shape as the slot closes.
Inventors
- 👤 E Martinez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:38
CPC Classifications
A; A47; A47G; A47G1/00; A47G1/02; F; F16; F16B; F16B5/00; F16B5/06; F16B5/0692; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44034; Y10T24/44043; Y10T24/4406; Y10T24/44641; Y10T24/44769; Y10T24/44778; Y10T24/44855
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
114 words
In combination, a frame, a flexible sheet over said frame, said frame having a groove, said groove having undercuts at its sides and a V-shaped bottom, and a strip pressing said sheet into said groove to bind the sheet tight on the frame, said strip normally having inclined wings and an apex at the junction of the wings and having a longitudinal slot at the top of the apex and being of normal inverted V-shape when not in the groove and being pressed into V-shape so that said wings extend upwardly into said undercuts when in the groove, and wherein the thickness of said sheet is substantially less than the thickness of said wings.
Claim 2
Dependent Claim
114 words
In combination, a frame, a flexible sheet over said frame, said frame having a groove, said groove having undercuts at its sides and a V-shaped bottom, and a strip pressing said sheet into said groove to bind the sheet tight on the frame, said strip normally having inclined wings and an apex at the junction of the wings and having a longitudinal slot at the top of the apex and being of normal inverted V-shape when not in the groove and being pressed into V-shape so that said wings extend upwardly into said undercuts when in the groove, and wherein the thickness of said sheet is substantially less than the thickness of said wings.
Claim 3
Dependent Claim
28 words
The combination of claim 1, wherein a portion of the surface of said sheet which is in contact with said wings resides within the undercut of said groove.
Claim 4
Dependent Claim
38 words
The combination of claim 1, said strip having opposed spaced surfaces at the inside of its slot which come into contact with each other when the strip is moved from normal inverted V-shape to V-shape in the groove.
Claim 5
Dependent Claim
54 words
The combination of claim 1, the bottom of said groove having inclined surfaces making a V and against which said wings press said sheet when said strip is moved from inverted V-shape out of the groove, to V-shape in the groove, with the outer edges of said wings pressing said sheet against said undercuts.
Claim 6
Dependent Claim
45 words
The combination of claim 4, the width of said strip in normal condition being greater than the width of the mouth of the groove, so that said wings have to be pressed together to facilitate insertion of the ends of the wings into said groove.
Claim 7
Dependent Claim
29 words
The combination of claim 4, said inclined surfaces at the bottom of the groove being of less angularity than said wings in the normal unflexed condition of said strip.
Claim 8
Dependent Claim
39 words
The combination of claim 6, said slot having a lower rectangular portion, from which inclined surfaces extend outwardly and upwardly, said inclined surfaces contacting one another when said strip is pressed from inverted V-shape to V-shape in the groove.
Claim 9
Dependent Claim
25 words
The combination of claim 7, the width between the undercut portion of the groove being substantially equal to the width of the normal unflexed strip.
Claim 10
Dependent Claim
13 words
The combination of claim 1, said groove being continuous all around the frame.
Claim 11
Dependent Claim
11 words
The combination of claim 9, said strip being flexible and continuous.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |