US3133681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pleat former
Assignee: Crown Risdon USA Inc
•
Filing: 1962-01-29
•
Granted: 1964-05-19
•
Expires: 1982-01-29
Abstract
No abstract record available.
Inventors
- 👤 William S Shee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:27
CPC Classifications
D; D06; D06J; D06J1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A TWO-PIECE PLEAT FORMER COMPRISING (A) AN ELONGATED FLAT SHEET METAL BACK PLATE HAVING A NARROW RIGID STRAIGHT LEG DEPENDING FROM ITS BOTTOM EDGE INTERMEDIATE THE ENDS THEREOF; (B) A FRONT SHEET METAL PIECE SLIDABLY FITTED AGAINST THE FRONT FACE OF SAID BACK PLATE, SAID FRONT PIECE HAVING A DOWNWARD EXTENSION PROVIDING A SECOND RIGID LEG PARALLEL TO SAID FIRST LEG AND AN ELONGATED GUIDE STRIP EXTENDING ALONG THE FRONT FACE OF THE BACK PLATE PERPENDICULARLY TO SAID LEGS; AND (C) INTEGRAL MEANS ON SAID BACK PLATE ENGAGING AROUND OPPOSITE OUTER EDGES OF SAID GUIDE STRIP FOR SLIDABLY RETAINING SAID STRIP TO ALLOW MOVEMENT OF SAID LEGS TOWARD AND AWAY FROM EACH OTHER WHILE MAINTAINING THEIR PARALLEL RELATIONSHIP; THE BOTTOM EDGE OF SAID BACK PLATE EXTENDING FROM AND PERPENDICULARLY TO ITS RIGID STRAIGHT LEG IN THE DIRECTION OF SAID GUIDE STRIP TO THE FRONT SHEET METAL PIECE A SUBSTANTIAL DISTANCE EQUAL AT LEAST TO THE WIDTH OF A PLEAT TO BE FORMED.
Claim 2
Dependent Claim
162 words
A TWO-PIECE PLEAT FORMER COMPRISING (A) AN ELONGATED FLAT SHEET METAL BACK PLATE HAVING A NARROW RIGID STRAIGHT LEG DEPENDING FROM ITS BOTTOM EDGE INTERMEDIATE THE ENDS THEREOF; (B) A FRONT SHEET METAL PIECE SLIDABLY FITTED AGAINST THE FRONT FACE OF SAID BACK PLATE, SAID FRONT PIECE HAVING A DOWNWARD EXTENSION PROVIDING A SECOND RIGID LEG PARALLEL TO SAID FIRST LEG AND AN ELONGATED GUIDE STRIP EXTENDING ALONG THE FRONT FACE OF THE BACK PLATE PERPENDICULARLY TO SAID LEGS; AND (C) INTEGRAL MEANS ON SAID BACK PLATE ENGAGING AROUND OPPOSITE OUTER EDGES OF SAID GUIDE STRIP FOR SLIDABLY RETAINING SAID STRIP TO ALLOW MOVEMENT OF SAID LEGS TOWARD AND AWAY FROM EACH OTHER WHILE MAINTAINING THEIR PARALLEL RELATIONSHIP; THE BOTTOM EDGE OF SAID BACK PLATE EXTENDING FROM AND PERPENDICULARLY TO ITS RIGID STRAIGHT LEG IN THE DIRECTION OF SAID GUIDE STRIP TO THE FRONT SHEET METAL PIECE A SUBSTANTIAL DISTANCE EQUAL AT LEAST TO THE WIDTH OF A PLEAT TO BE FORMED.
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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |