US3797281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating webs
Assignee: Sir James Farmer Norton and Co Ltd
•
Filing: 1972-03-07
•
Granted: 1974-03-19
•
Expires: 1992-03-07
Abstract
Abstract An apparatus for impregnating cloth with, for example a dye liquor in which the cloth is moved past a vacuum chamber which removes the air from the cloth and is then immediately subjected to the action of a dyeing bath. The evacuated cloth either is passed through the dye bath or it is moved past the outlet of a dye bath, the dye being fed gravitationally to the cloth in the latter case. An endless rubber belt ensures that there is no loss of vacuum at the vacuum chamber and assists in moving the cloth past the vacuum chamber and dye bath; the cloth is in direct contact with the vacuum chamber which is not rotated.
Inventors
- 👤 D Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:25
CPC Classifications
D; D06; D06B; D06B1/00; D06B1/10; D06B1/14; D06B1/144; D06B21/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
147 words
Apparatus for use in the impregnation treatment of a web with a fluid comprising vacuum chamber means, slot means formed in said chamber means and having a length at least equal to the width of the web to be impregnated, fluid impervious vacuumsealing belt means having a width greater than the length of said slot means for supporting and transporting said web, means supporting and driving said web carrying belt means past said slot means in fluid sealing contact with said vacuum chamber means, impregnation bath means disposed contiguously to said vaccum chamber means and said belt means on the downstream side of said chamber means in the direction of travel of said belt means whereby a web carried by said belt means will be subjected to a fluid in said bath means immediately subsequent to being subjected to a vacuum by passage over said slot means.
Claim 2
Dependent Claim
147 words
Apparatus for use in the impregnation treatment of a web with a fluid comprising vacuum chamber means, slot means formed in said chamber means and having a length at least equal to the width of the web to be impregnated, fluid impervious vacuumsealing belt means having a width greater than the length of said slot means for supporting and transporting said web, means supporting and driving said web carrying belt means past said slot means in fluid sealing contact with said vacuum chamber means, impregnation bath means disposed contiguously to said vaccum chamber means and said belt means on the downstream side of said chamber means in the direction of travel of said belt means whereby a web carried by said belt means will be subjected to a fluid in said bath means immediately subsequent to being subjected to a vacuum by passage over said slot means.
Claim 3
Dependent Claim
40 words
Apparatus as claimed in claim 1 in which said impregnation bath means has an impregnating fluid outlet opening directly on to a web which is being moved past said outlet in close contiguous contact therewith by said vacuum-sealing belt means.
Claim 4
Dependent Claim
21 words
Apparatus as claimed in claim 2, in which said slot means and said outlet are disposed closely adjacent to one another.
Claim 5
Dependent Claim
34 words
Apparatus as claimed in claim 3, comprising a wearing plate constituting the bottom of said vacuum chamber means and said impregnation bath means and being apertured to provide said slot means and said outlet.
Claim 6
Dependent Claim
16 words
Apparatus as claimed in claim 4, in which said outlet is defined by an elongated slot.
Claim 7
Dependent Claim
30 words
Apparatus as claimed in claim 5, in which said slot means and the interior of said chamber means are interconnected by a row of holes formed in said wearing plate.
Claim 8
Dependent Claim
103 words
Apparatus as claimed in claim 4, in which said slot means is defined by two rows of holes in the wearing plate extending transversely to the direction of travel of said belt means with the holes of one row staggered relative to the holes of the other row and with the bottoms of the holes in one of the rows merging in an elongated slot at their trailing edges in the direction of movement of said belt means, while the holes in the other row merge in an elongated slot at theIr leading edges in the direction of movement of said belt means.
Claim 9
Dependent Claim
17 words
Apparatus as claimed in claim 4, in which said wearing plate is formed of high density polyethylene.
Claim 10
Dependent Claim
79 words
Apparatus as claimed in claim 4, in which said wearing plate is substantially arcuate in the region of the vacuum chamber means and impregnation bath means, said belt means being endless and passing around a pair of rollers positioned at opposite ends of said plate to constrain said belt means to travel in an arcuate path over said wearing plate, means movably mounting one of said rollers for tensioning said belt while the other of said rollers is driven.
Claim 11
Dependent Claim
15 words
Apparatus as claimed in claim 9, comprising prime mover means for driving said driven roller.
Claim 12
Dependent Claim
87 words
Apparatus as claimed in claim 1 further comprising recirculatory circuit means including said impregnation bath means, a fluid supply tank connected to the impregnation bath means for feeding a fluid to the impregnation bath means, a fluid level tank also connected to the impregnation bath means to ensure topping up of the latter and a drip trough under the impregnation bath means to collect excess fluid, said impregnation bath means being disposed for gravitational feed of the impregnating fluid to a web passing beneath said bath means.
Claim 13
Dependent Claim
34 words
Apparatus as claimed in claim 1 further comprising a high vacuum pump and a high vacuum receiver and means connecting said vacuum chamber means to said high vacuum pump through said high vacuum receiver.
Claim 14
Dependent Claim
33 words
Apparatus as claimed in claim 1 further comprising squeezing nip means disposed downstream from said bath means in the direction of travel of said belt means to remove excess fluid from the web.
Claim 15
Dependent Claim
34 words
Apparatus as claimed in claim 1 further comprising suction means disposed downstream from said bath means in the direction of travel of said belt means which serves to remove excess fluid from the web.
Claim 16
Dependent Claim
40 words
Apparatus as claimed in claim 1 further comprising a closed casing having hinged covers surrounding and enclosing said vacuum sealing belt means, said vacuum chamber means, and said impregnation bath means and means connecting said casing to a solvent extractor.
Claim 17
Dependent Claim
70 words
Apparatus as claimed in claim 1 in which said vacuum chamber means is comprised of a vacuum tube having a vacuum slot therein extending transversely of said belt means, said belt means defining with the downstream wall of the vacuum tube the impregnating bath means whereby subsequent to passage over said vacuum a web carried by said belt means will be passed directly through fluid in said impregnating bath means.
References Cited (Backward Citations)
US426875A
Cited
US1606089A
Cited
US2494807A
Cited
US2624189A
Cited
US2817227A
Cited
US2876063A
Cited
US2900991A
Cited
US3190793A
Cited
US3163030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |