Coating processes – Application to opposite sides of sheet – web – or strip – Roller applicator utilized
Patent
1983-06-27
1984-10-02
Lusignan, Michael R.
Coating processes
Application to opposite sides of sheet, web, or strip
Roller applicator utilized
118126, 118206, 118246, 118410, 118419, 427356, 427361, 427428, B05C 108, B05D 312, B05D 128
Patent
active
RE0316954
ABSTRACT:
Two side coaters and methods of coating paper on both sides are disclosed in which a web of paper to be coated is moved in a generally upward direction in partially wrapped relation to a coating roll, so that one side of the web is in contact with and supported by the roll. This one side of the web is coated by a first coating material which is applied by the coating roll. This coating material is applied to the coating roll by an applicator roll, either directly in which a puddle is formed between the applicator roll and the coating roll, or through transfer from a pair of metering rolls in which the coating puddle is formed between the metering rolls. A second coating, which may be the same as or different from the first coating, is applied by a non-contacting jet fountain coater to an area on the opposite exposed side of the web just ahead of or including the area which is in wrapped relation to the coating roll, and the excess coating is blade doctored, employing the coating roll as a back-up roll for the doctor blade. The [blade] web side moves upwardly in view of the operator and is turned for subsequent drying or the like with the blade side up. There are also disclosed arrangements by which the lead-in and lead-out angles of the web may be controlled for the purpose of controlling the angle of contact and degree of wrap of the web with the coating roll. The method further contemplates conventional blade doctoring, bent-blade doctoring, and zero-angle blade doctoring.
REFERENCES:
patent: 3293067 (1966-12-01), Streb et al.
patent: 3418970 (1968-12-01), Phelps
patent: 4022151 (1977-05-01), Achelpohl
patent: 4076864 (1978-02-01), Wallsten
patent: 4177304 (1979-12-01), Berry
patent: 4231318 (1980-11-01), Zinc
patent: 4250207 (1981-02-01), Takahashi et al.
Lusignan Michael R.
The Black Clawson Company
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