US4402894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of a ceramic resistor
Assignee: Federal Mogul Ignition LLC
•
Filing: 1982-01-05
•
Granted: 1983-09-06
•
Expires: 2002-01-05
Abstract
Abstract An improved method for producing a ceramic resistor is disclosed. The method comprises the steps of charging ceramic batch into a longitudinally extending die, pressing the batch in the die between opposing plungers, removing one plunger from the die, ejecting the blank by moving the other plunger relative to the blank and firing the blank. The improvement constitutes imparting rotational motion to the removable plunger as applied pressure thereon is being released to remove the plunger from the die, whereby the surface of the plunger in contact with the blank separates therefrom without sticking.
Inventors
- 👤 Joseph Nemeth
- 👤 Frank J. Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:33
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/30; B; B28; B28B; B28B5/00; B28B5/06; B30; B30B; B30B11/00; B30B11/02; B30B11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
In a method for producing a ceramic resistor which method comprises charging ceramic resistor batch into a longitudinally extending die, pressing the ceramic resistor batch in the die between opposing plungers, removing a first plunger to form a blank from thedie, moving a second plunger to eject the blank from the die and firing the blank, the improvement of imparting rotational motion to the first plunger as the applied pressure thereon is being released preparatory to removing the first plunger from the die, whereby the surface of the first plunger is rotated relative to the blank and separates therefrom without sticking.
Claim 2
Dependent Claim
101 words
In a method for producing a ceramic resistor which method comprises charging ceramic resistor batch into a longitudinally extending die, pressing the ceramic resistor batch in the die between opposing plungers, removing a first plunger to form a blank from thedie, moving a second plunger to eject the blank from the die and firing the blank, the improvement of imparting rotational motion to the first plunger as the applied pressure thereon is being released preparatory to removing the first plunger from the die, whereby the surface of the first plunger is rotated relative to the blank and separates therefrom without sticking.
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) | 1986-09-05 | 1987-03-07 | 1987-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-05 | 1991-03-07 | 1991-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-05 | 1995-03-07 | 1995-09-06 | $7700.00 | Window Closed / Lapsed |