US2790729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating and coiling paper strips
Assignee: CAV Ltd
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Filing: 1954-07-19
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Granted: 1957-04-30
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Expires: 1974-07-19
Abstract
No abstract record available.
Inventors
- 👤 Pettitt Leslie Ernest
- 👤 Peasey Philip Rainham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:45
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/22; Y; Y10; Y10S; Y10S428/00; Y10S428/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
214 words
A METHOD OF COILING PERMEABLE PAPER STRIP TO EACH SIDE OF WHICH A NARROW LAYER OF ADHESIVE HAS BEEN APPLIED SO THAT THE TWO LAYERS OF ADHESIVE LIE ADJACENT TO OPPOSITE EDGES OF THE STRIP, AND WHICH IS REQUIRED FOR SUBSEQUENT USE IN A FILTER FORMING MACHINE, CONSISTING IN COILING ON A FIRST ROTARY SUPPORT A FIRST LENGTH OF THE PAPER STRIP SEVERAL TIMES GREATER THAN THE LENGTH REQUIRED IN A SINGLE FINISHED FILTER TO BE PRODUCED FROM THE STRIP, THE COILING BEING EFFECTED WHILST THE ADHESIVE ON THE STRIP IS DRYING, AND AT A RATE WHICH CAUSES THE COILING OPERATION TO BE COMPLETED IN ABOUT ONE HALF OF THE ADHESIVE DRYING TIME, INTERCOILING WITH THE PAPER STRIP, DURING THE COILING OPERATION, A SPACER STRIP FED FROM A AECOND ROTARY SUPPORT, RECOILING THE COILED PAPER STRIP WITH THE INTERCOILED SPACER STRIP ON THE SECOND ROTARY SUPPORT AT THE SAME RATE AS THE COILING OPERATION ON THE FIRST ROTARY SUPPORT AND WHILST THE ADHESIVE ON THE PAPER STRIP IS STILL DRYING, FEEDING THE RECOILED PAPER STRIP BEFORE THE ADHESIVE THEREON IS COMPLETELY DRY TO THE FILTER FORMING MACHINE WHILST REMOVING THE SPACER STRIP, AND INTERCOILING THE SPACER STRIP WITH A SECOND AND SIMILAR LENGTH OF THE PAPER STRIP BEING COILED ON THE FIRST ROTARY SUPPORT.
Claim 2
Independent Claim
214 words
A METHOD OF COILING PERMEABLE PAPER STRIP TO EACH SIDE OF WHICH A NARROW LAYER OF ADHESIVE HAS BEEN APPLIED SO THAT THE TWO LAYERS OF ADHESIVE LIE ADJACENT TO OPPOSITE EDGES OF THE STRIP, AND WHICH IS REQUIRED FOR SUBSEQUENT USE IN A FILTER FORMING MACHINE, CONSISTING IN COILING ON A FIRST ROTARY SUPPORT A FIRST LENGTH OF THE PAPER STRIP SEVERAL TIMES GREATER THAN THE LENGTH REQUIRED IN A SINGLE FINISHED FILTER TO BE PRODUCED FROM THE STRIP, THE COILING BEING EFFECTED WHILST THE ADHESIVE ON THE STRIP IS DRYING, AND AT A RATE WHICH CAUSES THE COILING OPERATION TO BE COMPLETED IN ABOUT ONE HALF OF THE ADHESIVE DRYING TIME, INTERCOILING WITH THE PAPER STRIP, DURING THE COILING OPERATION, A SPACER STRIP FED FROM A AECOND ROTARY SUPPORT, RECOILING THE COILED PAPER STRIP WITH THE INTERCOILED SPACER STRIP ON THE SECOND ROTARY SUPPORT AT THE SAME RATE AS THE COILING OPERATION ON THE FIRST ROTARY SUPPORT AND WHILST THE ADHESIVE ON THE PAPER STRIP IS STILL DRYING, FEEDING THE RECOILED PAPER STRIP BEFORE THE ADHESIVE THEREON IS COMPLETELY DRY TO THE FILTER FORMING MACHINE WHILST REMOVING THE SPACER STRIP, AND INTERCOILING THE SPACER STRIP WITH A SECOND AND SIMILAR LENGTH OF THE PAPER STRIP BEING COILED ON THE FIRST ROTARY SUPPORT.
References Cited (Backward Citations)
US1941328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |