US3622418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drawer manufacturing method
Assignee: Individual
•
Filing: 1970-06-16
•
Granted: 1971-11-23
•
Expires: 1990-06-16
Abstract
Abstract Method of producing drawer forms by extruding a sheet of plastic, the edges of which are notches at spaced intervals with substantially rectangular open sided opposed pairs of notches; the sheet is then successively cut transversely between each pair of notches to provide drawer blanks, the edge portions of which are bent from the plane of the bottom, and abutting side and back edges are welded together. In the method, calendering rollers produced reinforcing ribs on one of the plastic surfaces and a wood grain effect on the other.
Inventors
- 👤 William Horace Black
- 👤 Clarence Edward Pittman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:05
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/02; B29C59/04; A; A47; A47B; A47B88/00; A47B88/90; A47B88/941; A47B88/9412; A47B88/9414; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/54; B01J23/56; B01J23/64; B01J23/90; B01J23/96; B01J37/00; B01J37/22; B01J37/26; B29C48/00; B29C48/001; B29C53/00; B29C53/02; B29C53/04; B29C48/0017; B29C48/0019; B29C48/0022; B29C48/03; B29C48/07; B29C48/08; C; C07; C07C; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/42; C07C2523/44; C07C2523/46; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1023; Y10T156/1036; Y10T156/1039
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
25 words
The method of claim 1 in which the edges of the sheet, after notching, are progressively rolled downward and then inward to provide U-shaped lips.
Claim 2
Dependent Claim
32 words
The method of claim 2 in which the severed edge extending between the notches is turned downwardly and inwardly to form a U-shaped lip corresponding to the lips on the other edges.
Claim 3
Dependent Claim
34 words
The method of claim 3 including the further step of providing a series of spaced notches in the unbonded end of each of the portions of the sheet which are bent on longitudinal lines.
Claim 4
Dependent Claim
57 words
The method of claim 4 including the further steps of providing a front closure member for the drawer of greater thickness than the remaining walls of the drawer, forming said front closure with spaced tongues corresponding to the notches of the said series, and engaging said tongues in said notches to close the front of the drawer.
References Cited (Backward Citations)
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Cited
US2973697A
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US3148103A
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US3051605A
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US3141913A
Cited
US3268637A
Cited
US3286902A
Cited
US3454694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |