Patent US3188192A successfully refreshed from Google Patents.
US3188192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for continuously drawing sheet glass
Assignee: PPG Industries Inc
•
Filing: 1961-11-02
•
Granted: 1965-06-08
•
Expires: 1981-11-02
Abstract
No abstract record available.
Inventors
- 👤 Richard P Parobeck
- 👤 Leonard A Knavish
- 👤 Donald W Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:01
CPC Classifications
C; C03; C03B; C03B15/00; C03B15/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
IN AN APPARATUS FOR DRAWING SHEET GLASS AS A CONTINUOUS RIBBON AT A PREDETERMINED SPEED FROM A BATH OF MOLTEN GLASS UPWARDLY THROUGH A DRAWING CHAMBER, A FIRST PAIR OF DRAWING ROLLS DISPOSED WITH OPPOSING SURFACES CONSTANTLY ENGAGED WITH OPPOSITE FACES OF THE CONTINUOUS RIBBON OF GLASS MOVING UPWARDLY THEREBETWEEN, A SECOND PAIR OF DRAWING ROLLS POSITIONED BELOW SAID FIRST PAIR OF DRAWING ROLLS, ONE OF SAID LAST-NAMED DRAWING ROLLS BEING MOVABLE INTO AND OUT OF ENGAGEMENT WITH SAID RIBBON AND BEING NORMALLY MAINTAINED OUT OF ENGAGEMENT WITH SAID RIBBON, SPEED RESPONSIVE MEANS ENGAGING A SURFACE OF SAID RIBBON FOR PRODUCING AN IMPULSE INDICATIVE OF A DIFFERENTIAL REDUCTION IN THE SPEED OF SAID MOVING RIBBON, SAID SPEED RESPONSIVE MEANS BEING DISPOSED BELOW SAID FIRST PAIR OF DRAWING ROLLS AND ABOVE SAID BATH OF MOLTEN GLASS, AND MEANS FOR MOVING SAID MOVABLE ROLL OF SAID SECOND PAIR OF DRAWING ROLLS INTO ENGAGEMENT WITH SAID RIBBON IN RESPONSE TO SAID IMPULSE AND MAINTAINING SAID RIST AND SECOND PAIR OF ROLLS IN ENGAGEMENT WITH SAID RIBBON POSITIONED THEREBETWEEN.
Claim 2
Dependent Claim
175 words
IN AN APPARATUS FOR DRAWING SHEET GLASS AS A CONTINUOUS RIBBON AT A PREDETERMINED SPEED FROM A BATH OF MOLTEN GLASS UPWARDLY THROUGH A DRAWING CHAMBER, A FIRST PAIR OF DRAWING ROLLS DISPOSED WITH OPPOSING SURFACES CONSTANTLY ENGAGED WITH OPPOSITE FACES OF THE CONTINUOUS RIBBON OF GLASS MOVING UPWARDLY THEREBETWEEN, A SECOND PAIR OF DRAWING ROLLS POSITIONED BELOW SAID FIRST PAIR OF DRAWING ROLLS, ONE OF SAID LAST-NAMED DRAWING ROLLS BEING MOVABLE INTO AND OUT OF ENGAGEMENT WITH SAID RIBBON AND BEING NORMALLY MAINTAINED OUT OF ENGAGEMENT WITH SAID RIBBON, SPEED RESPONSIVE MEANS ENGAGING A SURFACE OF SAID RIBBON FOR PRODUCING AN IMPULSE INDICATIVE OF A DIFFERENTIAL REDUCTION IN THE SPEED OF SAID MOVING RIBBON, SAID SPEED RESPONSIVE MEANS BEING DISPOSED BELOW SAID FIRST PAIR OF DRAWING ROLLS AND ABOVE SAID BATH OF MOLTEN GLASS, AND MEANS FOR MOVING SAID MOVABLE ROLL OF SAID SECOND PAIR OF DRAWING ROLLS INTO ENGAGEMENT WITH SAID RIBBON IN RESPONSE TO SAID IMPULSE AND MAINTAINING SAID RIST AND SECOND PAIR OF ROLLS IN ENGAGEMENT WITH SAID RIBBON POSITIONED THEREBETWEEN.
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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |