US3762365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web coating apparatus
Assignee: Polytype AG
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Filing: 1972-02-24
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Granted: 1973-10-02
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Expires: 1992-02-24
Abstract
Abstract An apparatus for coating paper, tissue, cardboard, metal foils, thermoplastic films and similar materials includes a hard surfaced raster roll having regularly formed depressions or cells inset into its circumferential surface and over which surface the material to be coated is directed. A portion of the circumferential periphery of the raster roll rotates through an opening in a tank containing a liquid melt of the substance to be coated. The raster roll picks up the liquid melt as its circumferential peripheral surface rotates through the tank and a wiper blade is positioned at the location at which the roll exits from the tank for removing any excess of the liquid melt and retaining it within the tank. The blade has its edge,which contacts the roll,extending toward the roll in the direction opposite to the direction in which the roll rotates. Further, the tank and the wiper blade are mounted for oscillatory or reciprocatory movement relative to the raster roll.
Inventors
- 👤 P Herzog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:59
CPC Classifications
B; B05; B05C; B05C1/00; B05C1/04; B05C1/08; B05C1/086; B05C1/0808; D; D06; D06B; D06B1/00; D06B1/10; D06B1/14; D06B1/144; D21; D21H; D21H23/00; D21H23/02; D21H23/22; D21H23/52; D21H23/56; D21H23/58; D21H5/00; D21H5/0005; D21H5/0025; D21H5/003; D21H5/0032
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
351 words
Web coating apparatus comprising a horizontally elongated tank containing a pool of fluid coating substance and said tank including a pair of laterally spaced tank ends with a bottom member, and a back member extending between said tank ends and defining an opening formed in said tank extending in the horizontal direction thereof and formed in the lower portion of said tank ends and in an adjacent part of the bottom member and the opening arranged in communication with the pool of coating substance in the tank, a raster roll of a length longer than said tank having depressions formed in at least a portion of its central circumferential periphery and mounted for rotation about a horizontal axis positioned adjacent said opening of said tank, said raster roll extending along said tank with a portion of its circumferential periphery projecting through the opening in said tank into the pool of fluid coating substance therein, said tank ends disposed transversely of the axis of said roll and the lower portions of said tank ends being curved to complement and in sealing engagement with the curved surface of said roll means for oscillating said tank in the horizontal direction relative to said roll, and an elongated wiper blade mounted on said adjacent part of the bottom member of said tank and extending obliquely of the bottom of said tank, the wiping edge of said blade located closely adjacent to and extending along the circumferential periphery of said roll at the point of emergence of the surface of said roll from contact with the pool of fluid coating substance for providing a wiping action on the circumferential periphery of said roll, said blade is positioned so that its wiping edge in contact with said roll faces toward said roll in the direction opposite to the rotation of said roll when the roll surface is moved downwardly past said bottom member, and means arranged for adjustably mounting said wiper blade on the bottom surface of said tank and for providing a fine adjustment of its wiping edge relative to the circumferential periphery of said roll.
Claim 2
Dependent Claim
351 words
Web coating apparatus comprising a horizontally elongated tank containing a pool of fluid coating substance and said tank including a pair of laterally spaced tank ends with a bottom member, and a back member extending between said tank ends and defining an opening formed in said tank extending in the horizontal direction thereof and formed in the lower portion of said tank ends and in an adjacent part of the bottom member and the opening arranged in communication with the pool of coating substance in the tank, a raster roll of a length longer than said tank having depressions formed in at least a portion of its central circumferential periphery and mounted for rotation about a horizontal axis positioned adjacent said opening of said tank, said raster roll extending along said tank with a portion of its circumferential periphery projecting through the opening in said tank into the pool of fluid coating substance therein, said tank ends disposed transversely of the axis of said roll and the lower portions of said tank ends being curved to complement and in sealing engagement with the curved surface of said roll means for oscillating said tank in the horizontal direction relative to said roll, and an elongated wiper blade mounted on said adjacent part of the bottom member of said tank and extending obliquely of the bottom of said tank, the wiping edge of said blade located closely adjacent to and extending along the circumferential periphery of said roll at the point of emergence of the surface of said roll from contact with the pool of fluid coating substance for providing a wiping action on the circumferential periphery of said roll, said blade is positioned so that its wiping edge in contact with said roll faces toward said roll in the direction opposite to the rotation of said roll when the roll surface is moved downwardly past said bottom member, and means arranged for adjustably mounting said wiper blade on the bottom surface of said tank and for providing a fine adjustment of its wiping edge relative to the circumferential periphery of said roll.
Claim 3
Dependent Claim
59 words
Web coating apparatus, as set forth in claim 1, wherein the circumferential periphery of said raster roll having opposite end portions and a center portion extending between said end portions, the depressions formed in the circumferential periphery of said raster roll arranged in a uniformly spaced manner over the center portion of the circumferential periphery of said raster roll.
Claim 4
Dependent Claim
72 words
Web coating apparatus, as set forth in claim 1, wherein said means for oscillating said tank comprises a stationary frame, horizontally extending bushings fixed to said frame, horizontally extending guide members attached to said tank and slidably supported within said bushings, and means secured to said tank and fixed to said frame for oscillating said tank in the horizontal direction with said tank supported by said guide members sliding in said bushings.
Claim 5
Dependent Claim
58 words
Web coating apparatus, as set forth in claim 3, wherein said means secured to said tank and fixed to said frame includes a motor mounted on said tank, a rod sEcured to said motor and fixed to said stationary frame for effecting an oscillating movement as said motor is operated for transmitting the oscillating movement to said tank.
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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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |