US4226828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a reticulated web net
Assignee: Hercules LLC
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Filing: 1978-12-20
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Granted: 1980-10-07
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Expires: 1998-12-20
Abstract
Abstract The invention is a process for forming a reticulated web net oriented from a perforated film wherein the perforated film is produced by thermoforming projections or pips on an endless perforated surface and subsequently skiving the pips off flush with the film, said thermoforming, skiving and orientation all taking place in a continuous fashion.
Inventors
- 👤 John N. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:41
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/266; B29C51/268; B26; B26F; B26F1/00; B26F1/26; B29C51/18; B29C51/20; B29C51/24; B29D; B29D28/00; Y; Y10; Y10S; Y10S264/00; Y10S264/70
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
101 words
A process for forming a reticulated web net comprising: providing a film of thermoplastic polymeric material; heating said film to a temperature suitable for thermoforming; then placing said film in contact with a perforated surface; then subjecting said film to a pressure differential to force portions of the film into the perforations of said perforated surface thus forming pips; then cooling said film to harden the film; then stripping the film from the perforated surface; then skiving off the pips substantially parallel to the surface of said film; and then biaxially stretching and orienting said film into a reticulated web net.
Claim 2
Dependent Claim
101 words
A process for forming a reticulated web net comprising: providing a film of thermoplastic polymeric material; heating said film to a temperature suitable for thermoforming; then placing said film in contact with a perforated surface; then subjecting said film to a pressure differential to force portions of the film into the perforations of said perforated surface thus forming pips; then cooling said film to harden the film; then stripping the film from the perforated surface; then skiving off the pips substantially parallel to the surface of said film; and then biaxially stretching and orienting said film into a reticulated web net.
Claim 3
Dependent Claim
24 words
A process as in claim 1 wherein the thermoformable film is provided in thermoformable condition by extruding said film directly onto the perforated surface.
Claim 4
Dependent Claim
27 words
A process as in claim 2 wherein said thermoplastic film is extruded vertically downwardly into contact with said perforated surface thereby preventing distortion of said thermoplastic film.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-07 | 1984-04-07 | 1984-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-07 | 1988-04-07 | 1988-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-07 | 1992-04-07 | 1992-10-07 | $7700.00 | Window Closed / Lapsed |