US3694634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pattern repeat length control system
Assignee: Armstrong World Industries Inc
•
Filing: 1971-08-16
•
Granted: 1972-09-26
•
Expires: 1991-08-16
Abstract
Abstract Digital inputs are fed to a programmed digital computer for a precise measurement and calculation of key line-speed parameters. The ratio of the web infeed speed measured at a point upstream of all processing actions relative to the embossing roll speed is the controlled variable. Digital speed recorders measure the web infeed speed and the embossing roll speed. The relationship between these two is automatically manipulated by the digital computer which reflect the process dynamics and describe the desired system response.
Inventors
- 👤 Robert L Horst
- 👤 Richard M Ringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:12
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/18; B65H23/188; B65H23/1882
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
In a method for controlling the repeat pattern length on embossed materials, involving the steps of providing upstream processing to the web before the embossing step, Embossing the web material, and providing downstream processing to the web of material, the improvement comprising: sensing the line speed of the web prior to the upstream processing of the web, sensing the embossing roll speed during the embossing operation, and maintaining the ratio of web speed to embossing roll speed within a preset range to provide a product at the end of the downstream processing, which product has the repeat patterns of the embossing in a controlled repeat length.
Claim 2
Dependent Claim
106 words
In a method for controlling the repeat pattern length on embossed materials, involving the steps of providing upstream processing to the web before the embossing step, Embossing the web material, and providing downstream processing to the web of material, the improvement comprising: sensing the line speed of the web prior to the upstream processing of the web, sensing the embossing roll speed during the embossing operation, and maintaining the ratio of web speed to embossing roll speed within a preset range to provide a product at the end of the downstream processing, which product has the repeat patterns of the embossing in a controlled repeat length.
Claim 3
Dependent Claim
38 words
In the method of claim 1, the further step of comparing the sensed speed ratio with a fixed reference ratio and automatically providing control signals to an embossing roll drive to keep the ratio within the preset range.
Claim 4
Dependent Claim
20 words
In the method of claim 2, the further step of controlling the size of the control signal within preset limits.
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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |