US3906127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drawing board
Assignee: Teledyne Inc
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Filing: 1973-09-10
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Granted: 1975-09-16
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Expires: 1993-09-10
Abstract
Abstract A lightweight, dimensionally stable, nonwood drawing board. An inner core of uniform thickness with parallel planar opposite surfaces is formed of a structural material such as resinimpregnated paper honeycomb, foamed polystyrene, or other structural materials having similar properties in respect to density, dimensional stability, dent resistance and strength in compression. The top and bottom surfaces of the inner core have laminated thereto facing sheets formed of smooth moistureresistant plastic. An outer metal frame of U-shaped cross section completely embraces or extends around the inner core with the top and bottom surfaces of the frame legs being flush and contiguous with the top and bottom surfaces, respectively, of the inner core. The margins of the top and bottom facing sheets overlap onto the top and bottom surfaces of the frame legs and are adhered or laminated thereto so as to completely seal the inner core within the envelope formed by the top and bottom facing sheets and the frame.
Inventors
- 👤 Walter G Hollmann
- 👤 Harry O Newlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:00
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; A; A47; A47B; A47B13/00; A47B13/08; B32B27/00; B32B27/06; B32B27/10; B32B27/30; B32B27/302; B32B29/00; B32B29/08; B32B2307/00; B32B2307/70; B32B2307/726; B32B2307/7265; B32B2307/732; B32B2307/734; B32B2317/00; B32B2317/12; B32B2317/125; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/234; Y10T428/236; Y10T428/24; Y10T428/24149; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249988; Y10T428/249991; Y10T428/249992; Y10T428/249993
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
207 words
A LIGHTWEIGHT DIMENSIONALLY STABLE NON-WOOD DRAWING BOARD COMPRISING AN INNER CORE OF UNIFORM THICKNESS FORMED OF RESIN-IMPREGNATED CORRUGATED PAPER HONEYCOMB TOP AND BOTTOM FACING SHEETS LAMINATED TO THE OPPOSITE FACES OF SAID INNER CORE AND FORMED OF SMOOTH MOISTURE RESISTANT PREFORMED SHEETS OF HIGH IMPACT POLYSTYRENE AND AN OUTER ALUMINUM FRAME OF U-SHAPED CROSS SECTION EXTENDING COMPLETELY AROUND SAID INNER CORE WITH THE SPACED LEGS OF SAID FRAME EXTENDING INWARDLY TOWARD SAID INNER CORE AND WITH THE BIGHT PORTION OF SAID FRAME FORMING THE CONTINUOUS OUTERMOST SIDE EDGE OF THE DRAWING BOARD AND WITH PORTIONS ONLY OF THE TOP AND BOTTOM SURFACES OF THE FRAME LEGS ADJACENT THEIR DISTAL ENDS BEING FLUSH AND CONTIGUOUS WITH THE TOP AND BOTTOM SURFACES RESPECTIVELY OF SAID INNER CORE THE MARGINS OF SAID TOP AND BOTTOM FACING SHEETS OVERLAPPING ONTO SAID FLUSH TOP AND BOTTOM SURFACE PORTIONS RESPECTIVELY OF SAID FRAME LEGS AND BEING ADHERED THERETO SO AS TO THEREBY SEAL INNER CORE IN THE ENVELOPE FORMED BY SAID FACING SHEETS AND FRAME THE PERIPHERAL EDGES OF SAID TOP AND BOTTOM FACING SHEETS ABUTTING CONTINUOUS SHOULDERS FORMED IN THE TOP AND BOTTOM SURFACES, RESPECTIVELY OF SAID LEGS AT THE JUNCTURES OF SAID FLUSH SURFACE PORTION AND THE REMAINING NON-FLUSH SURFACE PORTINS.
Claim 2
Dependent Claim
207 words
A LIGHTWEIGHT DIMENSIONALLY STABLE NON-WOOD DRAWING BOARD COMPRISING AN INNER CORE OF UNIFORM THICKNESS FORMED OF RESIN-IMPREGNATED CORRUGATED PAPER HONEYCOMB TOP AND BOTTOM FACING SHEETS LAMINATED TO THE OPPOSITE FACES OF SAID INNER CORE AND FORMED OF SMOOTH MOISTURE RESISTANT PREFORMED SHEETS OF HIGH IMPACT POLYSTYRENE AND AN OUTER ALUMINUM FRAME OF U-SHAPED CROSS SECTION EXTENDING COMPLETELY AROUND SAID INNER CORE WITH THE SPACED LEGS OF SAID FRAME EXTENDING INWARDLY TOWARD SAID INNER CORE AND WITH THE BIGHT PORTION OF SAID FRAME FORMING THE CONTINUOUS OUTERMOST SIDE EDGE OF THE DRAWING BOARD AND WITH PORTIONS ONLY OF THE TOP AND BOTTOM SURFACES OF THE FRAME LEGS ADJACENT THEIR DISTAL ENDS BEING FLUSH AND CONTIGUOUS WITH THE TOP AND BOTTOM SURFACES RESPECTIVELY OF SAID INNER CORE THE MARGINS OF SAID TOP AND BOTTOM FACING SHEETS OVERLAPPING ONTO SAID FLUSH TOP AND BOTTOM SURFACE PORTIONS RESPECTIVELY OF SAID FRAME LEGS AND BEING ADHERED THERETO SO AS TO THEREBY SEAL INNER CORE IN THE ENVELOPE FORMED BY SAID FACING SHEETS AND FRAME THE PERIPHERAL EDGES OF SAID TOP AND BOTTOM FACING SHEETS ABUTTING CONTINUOUS SHOULDERS FORMED IN THE TOP AND BOTTOM SURFACES, RESPECTIVELY OF SAID LEGS AT THE JUNCTURES OF SAID FLUSH SURFACE PORTION AND THE REMAINING NON-FLUSH SURFACE PORTINS.
Claim 3
Dependent Claim
42 words
The drawing board of claim 1 wherein said resin-impregnated corrugated paper honeycomb core has (1) from 1/4 to 1/2 inch vertical cells, (2) a vertical thickness of from 1/2 to 3/4 inch, and (3) a phenolic resin content of approximately 10 percent.
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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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |