Coater for both sides of traveling web

Claim 2

A mechanism for applying liquid coating to coat the surfaces of a continuous traveling web with a smooth coating finish comprising in combination: means guiding a traveling web along a coating path through a coating station; a coating applying means at said station applying a continuous layer of coating to each side of the traveling web; first and second opposed thin flexible smoothing blades positioned after the coating station in said coating path with each having a smooth continuous uniform smoothing surface facing the web so that said surface will have an arc of curvature as said blade is pressed toward the web; and first and second blade supporting and loading means positioned to respectively support the blades on each side of the web with the blades positioned so that said arc of curvature of the blades will be tangent to the planes of the surfaces of the traveling web as the blade loading means presses the blades toward each other.

Claim 3

A mechanism for applying liquid coating to coat the surfaces of a continuous traveling web with a smooth coating finish constructed in accordance with claim 1, wherein said blades of a length so that said arc of curvature extends away from the web downstream of the point of tangency in the direction the web travels.

Claim 4

A mechanism for applying liquid coating to coat the surfaces of a continuous traveling web with a smooth coating finish constructed in accordance with claim 1, where said blades have uniform flexibility along their length.

Claim 5

A mechanism for applying liquid coating to coat the surfaces of a continuous traveling web with a smooth coating finish constructed in accordance with claim 1, wherein said blades are of uniform thickness in the direction of web travel.

Claim 6

A mechanism for applying liquid coating to coat the surfaces of a continuous traveling web with a smooth coating finish constructed in accordance with claim 1, wherein said guiding means is positioned so that said web travels upwardly through said coating station and said blades extend upwardly in the direction of web travel.

Claim 7

A mechanism for applying liquid coating to coat the surfaces of a continuous traveling web with a smooth coating finish constructed in accordance with claim 5, wherein said applying means applies an excess coating and the excess coating flows gravitationally downwardly.

Claim 8

A mechanism for applying liquid coating to coat the surfaces of a continuous traveling web with a smooth coating finish constructed in accordance with claim 6, wherein said applying means includes a continuous elongate pressure opening at each side of the web with means for delivering coating under pressure to said opening.

Claim 9

A mechanism for applying coating to coat the surfaces of a continuous traveling web with a smooth coating finish constructed in accordance with claim 5, including a guard blade at each side of the web, each having an upwardly facing coating deflecting surface terminating at an edge in close running relationship to the coating surface and deflecting any droplets of coating falling downwardly away from the web surface.

Claim 10

A mechanism for applying liquid coating to coat the surfaces of a continuous traveling web with a smooth coating finish constructed in accordance with claim 5, including a mount for said blades supporting and loading means with said supporting and loading means movable between a first operating position and a second threading position away from the web.

Claim 11

A mechanism for applying liquid coating to coat the surfaces of a continuous traveling web with a smooth coating finish constructed in accordance with claim 1, wherein said blade loading means includes a common force applying means applying simultaneously uniform force to each of the blades.

Claim 12

A mechanism for applying liquid coating to coat the surfaces of a continuous traveling web with a smooth coating finish constructed in accordance with claim 1, including first and second hollow resilient tubes respectively for the blades coextensive therewith and in supporting engagement with the surface of the blade facing away from the web.

Claim 13

A mechanism for applying liquid coating to coat the surfaces of a continuous traveling web with a smooth coating finish constructed in accordance with claim 1, wherein said blade supporting and loading means includes first and second arms for the blades respectively with the upstream edges of the blades supported on the arms and including resilient means between the downstream ends of the arms and the downstream ends of the blades applying a uniform resilient force along the length of the blade tranversely of the direction of web movement.

Claim 14

A mechanism for applying liquid coating to coat the surfaces of a continuous traveling web with a smooth coating finish comprising in combination: means guiding a traveling web along a coating path through a coating station; first and second coating applicators respectively positioned at each side of the web with each applicator having a pressure coating opening extending continuously across the web; means for applying coating under pressure to each of said openings; said web passing through said coating station in a vertical up direction; a smooth surfaces shoe positioned immediately after said openings on each side of the web for distributing the coating; and opposed first and second thin flexible smoothing blades positioned above said openings extending in the direction of web travel for applying a smoothing pressure to the coating on the traveling web with the blades forming arcs tangent to the web surfaces.

Claim 15

A mechanism for applying liquid coating to coat the surfaces of a continuous traveling web with a smooth coating finish comprising in combination: means guiding a traveling web along a coating path through a coating station; first and second coating applicators respectively positioned at each side of the web with each applicator having a pressure coating opening extending continuously across the web; means for applying coating under pressure to each of said openings; said web passing through said coating station in a vertical up direction; a smooth surfaces shoe positioned immediately after said openings on each side of the web for distributing the coating; and opposed first and second thin flexible smoothing blades positioned above said openings extending in the direction of web travel for applying a smoothing pressure to the coating on the traveling web with the blades forming arcs tangent to the web surfaces.

Claim 16

A mechanism for applying liquid coating to coat the surfaces of a continuous traveling web with a smooth coating finish comprising in combination: vertically sequentially positioned coating applying and smoothing elements including applying means at each side of said web applying a continuous layer of coating to each side of the traveling web with excess coatingfalling downwardly; first opposed deflector means below said applying means extending in close running relationship with the web on each side thereof and deflecting falling coating away from the web; first and second opposed thin flexible smoothing blades pressed against the web above said applying means for smoothing the coating and forming arcs tangent to the surfaces of the belt; and a second deflector means positioned between the applying means and the smoothing blades in close running relationship with the web on each side thereof deflecting coating falling downwardly away from the surfaces of the traveling web.

Claim 17

A mechanism for applying liquid coating to coat the surfaces of a continuous traveling web with a smooth coating finish comprising in combination: vertically sequentially positioned coating applying and smoothing elements including applying means at each side of said web applying a continuous layer of coating to each side of the traveling web with excess coatingfalling downwardly; first opposed deflector means below said applying means extending in close running relationship with the web on each side thereof and deflecting falling coating away from the web; first and second opposed thin flexible smoothing blades pressed against the web above said applying means for smoothing the coating and forming arcs tangent to the surfaces of the belt; and a second deflector means positioned between the applying means and the smoothing blades in close running relationship with the web on each side thereof deflecting coating falling downwardly away from the surfaces of the traveling web.