US3361552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for bending horizontally conveyed glass sheets between opposed shaping molds
Assignee: Libbey Owens Ford Glass Co
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Filing: 1963-10-16
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Granted: 1968-01-02
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Expires: 1983-10-16
Abstract
No abstract record available.
Inventors
- 👤 Jr George F Ritter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:26
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B23/03; C03B23/0302; C03B2225/00; C03B2225/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
152 words
IN A METHOD OF BENDING GLASS SHEETS, THE STEPS OF HEATING A SHEET TO BE BENT TO AN ELEVATED BENDING TEMPERATURE, SUPPORTING SAID HEATED SHEET IN A SUBSTANTIALLY HORIZONTAL PLANE BETWEEN UPPER AND LOWER MOLD PARTS DISPOSED ABOVE AND BELOW SAID HORIZONTAL PLANE AND HAVING OPPOSED COMPLEMENTAL SHAPING SURFACES FORMED THEREON, MOVING SAID LOWER MOLD PART TOWARD SAID UPPER MOLD PART THEREBY TO LIFT SAID GLASS SHEET FROM SAID PLANE AND CARRY THE SHEET INTO PRESSING ENGAGEMENT WITH SAID SHAPING SURFACE ON SAID UPPER MOLD PART AND THEREAFTER LOWERING SAID LOWER MOLD PART TO RETURN SAID PLANE, AND DIRECTING A BLAST OF AIR UNDER PRESSURE THROUGH SAID SHAPING SURFACE ON SAID UPPER MOLD PART WHILE SAID SHEET IS IN ENGAGEMENT THEREWITH AND AS SAID LOWER MOLD PART BEGINS ITS DOWNWARD MOVEMENT THEREBY TO URGE SAID SHEET AWAY FROM SAID SHAPING SURFACE ON SAID UPPER MOLD PART AND AGAINST SAID LOWER MOLD PART.
Claim 2
Dependent Claim
152 words
IN A METHOD OF BENDING GLASS SHEETS, THE STEPS OF HEATING A SHEET TO BE BENT TO AN ELEVATED BENDING TEMPERATURE, SUPPORTING SAID HEATED SHEET IN A SUBSTANTIALLY HORIZONTAL PLANE BETWEEN UPPER AND LOWER MOLD PARTS DISPOSED ABOVE AND BELOW SAID HORIZONTAL PLANE AND HAVING OPPOSED COMPLEMENTAL SHAPING SURFACES FORMED THEREON, MOVING SAID LOWER MOLD PART TOWARD SAID UPPER MOLD PART THEREBY TO LIFT SAID GLASS SHEET FROM SAID PLANE AND CARRY THE SHEET INTO PRESSING ENGAGEMENT WITH SAID SHAPING SURFACE ON SAID UPPER MOLD PART AND THEREAFTER LOWERING SAID LOWER MOLD PART TO RETURN SAID PLANE, AND DIRECTING A BLAST OF AIR UNDER PRESSURE THROUGH SAID SHAPING SURFACE ON SAID UPPER MOLD PART WHILE SAID SHEET IS IN ENGAGEMENT THEREWITH AND AS SAID LOWER MOLD PART BEGINS ITS DOWNWARD MOVEMENT THEREBY TO URGE SAID SHEET AWAY FROM SAID SHAPING SURFACE ON SAID UPPER MOLD PART AND AGAINST SAID LOWER MOLD PART.
Claim 3
Dependent Claim
145 words
IN APPARATUS FOR BENDING GLASS SHEETS, THE COMBINATION OF, MEANS SUPPORTING A GLASS SHEET TO BE BENT IN A SUBSTANTIALLY HORIZONTAL PLANE, AN UPPER MOLD PART SUPPORTED ABOVE SAID PLANE AND HAVING A SUBSTANTIALLY HORIZONTALLY DISPOSED WALL, A SHAPING SURFACE FORMED ON A DOWNWARDLY DIRECTED FACE OF SAID WALL, AN OPEN RING TYPE LOWER MOLD PART HAVING AN OPPOSED COMPLEMNTAL SHAPING SURFACE FORMED THEREON ENGAGELABLE WITH THE MARGINAL EDGE PORTIONS ONLY OF THE SHEET, MEANS SUPPORTING SAID LOWER MOLD PART FOR VERTICAL MOVEMENT TOWARD AND AWAY FROM SAID UPPER MOLD PART, MEANS DEFINING A SEALED AIR CHAMBER ADJACENT THE UPPER FACE OF SAID WALL, SAID WALL HAVING A PLURALITY OF ORIFICES FORMED THERETHROUGH AND COMMUNICATING WITH SAID AIR CHAMBR, AND MEANS SUPPLYING AIR UNDER PRESSURE TO SAID AIR CHAMBER AS THE SHEET IS PRESSED BETWEEN SAID SHAPING SURFACES ON SAID UPPER AND LOWER MOLD PARTS.
Claim 4
Dependent Claim
145 words
IN APPARATUS FOR BENDING GLASS SHEETS, THE COMBINATION OF, MEANS SUPPORTING A GLASS SHEET TO BE BENT IN A SUBSTANTIALLY HORIZONTAL PLANE, AN UPPER MOLD PART SUPPORTED ABOVE SAID PLANE AND HAVING A SUBSTANTIALLY HORIZONTALLY DISPOSED WALL, A SHAPING SURFACE FORMED ON A DOWNWARDLY DIRECTED FACE OF SAID WALL, AN OPEN RING TYPE LOWER MOLD PART HAVING AN OPPOSED COMPLEMNTAL SHAPING SURFACE FORMED THEREON ENGAGELABLE WITH THE MARGINAL EDGE PORTIONS ONLY OF THE SHEET, MEANS SUPPORTING SAID LOWER MOLD PART FOR VERTICAL MOVEMENT TOWARD AND AWAY FROM SAID UPPER MOLD PART, MEANS DEFINING A SEALED AIR CHAMBER ADJACENT THE UPPER FACE OF SAID WALL, SAID WALL HAVING A PLURALITY OF ORIFICES FORMED THERETHROUGH AND COMMUNICATING WITH SAID AIR CHAMBR, AND MEANS SUPPLYING AIR UNDER PRESSURE TO SAID AIR CHAMBER AS THE SHEET IS PRESSED BETWEEN SAID SHAPING SURFACES ON SAID UPPER AND LOWER MOLD PARTS.
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) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |