US3843760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Channel cloth extrusion apparatus and process
Assignee: MOUNT VERNON MILLS Inc A CORP OF
•
Filing: 1972-04-04
•
Granted: 1974-10-22
•
Expires: 1992-04-04
Abstract
Abstract An apparatus and process for extruding a backing plastic layer upon channel cloth in a manner which aligns and maintains a plurality of rows of pile in precise parallel relation and which avoids crushing of the pile.
Inventors
- 👤 R Teed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:59
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/26; B05D1/265; B29; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/12; B29C48/25; B29C48/88; B29C48/91; B29C48/911; B29C48/9135; B29C48/914; B29C48/9145; B29C48/07; B29C48/08; Y; Y10; Y10S; Y10S264/00; Y10S264/65; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23986
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
217 words
An apparatus for extruding a thin layer of plastic material and the like on the back of a base strip of channel cloth having a plurality of parallel rows of weatherstripping pile projecting from the opposite side thereof comprising: a first roller including means on the surface thereof for positively gripping said base strip while permitting said rows of pile to project freely without crushing the pile; means for guiding channel cloth to said first roller, a second roller including means on the surface thereof for positively gripping said base strip while permitting said rows of pile to project freely without crushing the pile; means fOr driving said first and second rollers at different speeds to stretch the channel cloth therebetween sufficient to cause alignment of said pile in straight parallel rows and to maintain said base strip in a flattened condition; means for extruding a thin film of plastic material upon the back of said base strip while the channel cloth is in a stretched condition; means for substantially solidifying said plastic material while said cloth is in a stretched condition; and means for guiding said cloth to said solidifying means while pressing said base strip against a surface of said solidifying means to maintain the thickness of said plastic material backing within predetermined dimensional ranges.
Claim 2
Independent Claim
217 words
An apparatus for extruding a thin layer of plastic material and the like on the back of a base strip of channel cloth having a plurality of parallel rows of weatherstripping pile projecting from the opposite side thereof comprising: a first roller including means on the surface thereof for positively gripping said base strip while permitting said rows of pile to project freely without crushing the pile; means for guiding channel cloth to said first roller, a second roller including means on the surface thereof for positively gripping said base strip while permitting said rows of pile to project freely without crushing the pile; means fOr driving said first and second rollers at different speeds to stretch the channel cloth therebetween sufficient to cause alignment of said pile in straight parallel rows and to maintain said base strip in a flattened condition; means for extruding a thin film of plastic material upon the back of said base strip while the channel cloth is in a stretched condition; means for substantially solidifying said plastic material while said cloth is in a stretched condition; and means for guiding said cloth to said solidifying means while pressing said base strip against a surface of said solidifying means to maintain the thickness of said plastic material backing within predetermined dimensional ranges.
Claim 3
Dependent Claim
33 words
The apparatus according to claim 1 wherein a plurality of pins project from said first and second rollers engaging said channel cloth base strip before and after extrusion of said plastic material layer.
Claim 4
Dependent Claim
62 words
The apparatus according to claim 2 wherein said extruding means is adapted to extrude a thin film of molten polypropylene upon said base strip, and said solidifying means comprises a cooling drum for receiving the extruded layer while permitting said rows of pile to project freely therefrom and said guiding means brings said thermoplastic material layer into contact with said cooling drum.
Claim 5
Dependent Claim
59 words
The apparatus according to claim 3 wherein said guiding means includes parallel arcuate plates which define pile grooves permitting said plates to bear against the channel cloth base strip between said rows of pile while maintaining the spacing between said parallel rows, with means for adjusting the relative pressure brought to bear by said plates against said base strip.
Claim 6
Dependent Claim
23 words
The apparatus according to claim 3 further comprising a preheater for heating said base strip prior to extrusion of said plastic material thereupon.
Claim 7
Dependent Claim
41 words
The apparatus according to claim 5 wherein said preheater includes edge guide means for controlling the position of said channel cloth as it passes beneath the preheater, and means for regulating and adjusting the height and lateral positioning of the preheater.
Claim 8
Independent Claim
186 words
A method of depositing a thin layer of plastic material and the like upon the back of a base strip of channel cloth to provide dimensional accuracy within predetermined ranges, the cloth having a plurality of parallel rows of weatherstripping pile projecting from the opposite side thereof comprising the steps of: continuously feeding said channel cloth; subjecting said channel cloth to predetermined controlled lengthwise tension sufficient to maintain the base strip in a flattened condition and to maintain the pile rows in parallel alignment while positively stretching the base strip and simultaneously maintaining said rows of pile free from crushing contact; extruding a thin film of plastic material on the back of said base strip; guiding said channel cloth to a solidifying means while pressing the base strip against a surface of said solidifying means to maintain the thickness of said plastic material backing within said predetermined dimensional ranges and maintaining the parallel alignment and spacing of said pile rows; and permitting said backing strip to substantially solidify, said predetermined controlled lengthwise tension being continuously maintained prior to, during and after said extrusion and solidifying steps.
Claim 9
Independent Claim
186 words
A method of depositing a thin layer of plastic material and the like upon the back of a base strip of channel cloth to provide dimensional accuracy within predetermined ranges, the cloth having a plurality of parallel rows of weatherstripping pile projecting from the opposite side thereof comprising the steps of: continuously feeding said channel cloth; subjecting said channel cloth to predetermined controlled lengthwise tension sufficient to maintain the base strip in a flattened condition and to maintain the pile rows in parallel alignment while positively stretching the base strip and simultaneously maintaining said rows of pile free from crushing contact; extruding a thin film of plastic material on the back of said base strip; guiding said channel cloth to a solidifying means while pressing the base strip against a surface of said solidifying means to maintain the thickness of said plastic material backing within said predetermined dimensional ranges and maintaining the parallel alignment and spacing of said pile rows; and permitting said backing strip to substantially solidify, said predetermined controlled lengthwise tension being continuously maintained prior to, during and after said extrusion and solidifying steps.
Claim 10
Dependent Claim
30 words
The method according to claim 7 wherein said plastic material is molten when extruded and said solidifying step is accomplished by cooling the plastic material to solidify the extruded layer.
Claim 11
Dependent Claim
25 words
The method according to claim 8 further comprising preheating the base strip of said channel cloth immediately prior to extruding said layer of plastic material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |