Apparatus for coating sheet material

Claim 2

A coating apparatus for coating sheet material with a liquid coating composition, said apparatus comprising (1) a reservoir for holding said liquid coating composition; (2) an absorption wick in communication with said reservoir to receive coating composition therefrom, said absorption wick having an arcuate surface; (3) a transfer wick in conforming contact with the arcuate surface of said absorption wick to receive coating composition therefrom, one end of said transfer wick being free to move toward and away from said arcuate surface; and (4) means for advancing the sheet material to be coated across and in contact with the end of said transfer wick which is free to move to apply a uniform layer of said coating composition to the surface of said sheet material.

Claim 3

Coating apparatus as defined in claim 1 wherein said reservoir is a cylinder having a longitudinal slot therein to permit passage of said liquid coating composition into said absorption wick.

Claim 4

Coating apparatus as defined in claim 2 additionally comprising a liquid distributing cylinder positioned within said slotted cylinder to form an annular chamber for said liquid coating composition.

Claim 5

Coating apparatus as defined in claim 1 wherein said absorption wick is composed of felt.

Claim 6

Coating apparatus as defined in claim 2 wherein said absorption wick consists of a layer of felt partially surrounding the cylindrical outer surface of said slotted cylinder and covering said slot.

Claim 7

Coating apparatus as defined in claim 1 wherein said transfer wick is composed of finely woven fabric.

Claim 8

Coating apparatus as defined in claim 1 wherein said transfer wick is composed of finely woven cotton fabric.

Claim 9

Coating apparatus as defined in claim 2 wherein said transfer wick consists of a sheet of finely woven fabric which has been folded over upon itself several times and in which the free end thereof is located in proximity to said slot.

Claim 10

Apparatus for use in the coating of sheet material with a liquid coating composition, said apparatus comprising (1) a reservoir for holding said liquid coating composition; (2) an absorption wick in communication with said reservoir to receive coating composition therefrom, said absorption wick having an arcuate surface; and (3) a transfer wick in conforming contact with the arcuate surface of said absorption wick to receive coating composition therefrom, said transfer wick being free at one end thereof to move toward and away from said arcuate surface and said free end being positioned to contact the surface of the sheet material to be coated.

Claim 11

Apparatus for use in the coating of sheet material with a liquid coating composition, said apparatus comprising (1) a reservoir for holding said liquid coating composition; (2) an absorption wick in communication with said reservoir to receive coating composition therefrom, said absorption wick having an arcuate surface; and (3) a transfer wick in conforming contact with the arcuate surface of said absorption wick to receive coating composition therefrom, said transfer wick being free at one end thereof to move toward and away from said arcuate surface and said free end being positioned to contact the surface of the sheet material to be coated.

Claim 12

Apparatus as defined in claim 9 wherein said reservoir is a cylinder having a longitudinal slot in the cylindrical surface thereof, said absorption wick is a layer of felt partially surrounding the cylindrical surface of said cylinder and covering said slot, and said transfer wick is a sheet of fabric overlying a portion of the surface of said layer of felt which is fixed at one end and has a free end located in proximity to said slot.

Claim 13

A coating apparatus for coating sheet material with a liquid coating composition, said apparatus comprising (1) a reservoir for holding liquid coating composition; (2) a body of bibulous material in communication with said reservoir to receive coating composition therefrom, said body having an arcuate surface; (3) a sheet of fabric in conforming contact with the arcuate surface of said body of bibulous material to receive coating composition therefrom, said sheet of fabric being fixedly held at one end thereof and free at the opposite end thereof to move toward and away from said arcuate surface; and (4) means for advancing the sheet material to be coated in a direction tangential to said arcuate surface into contact with the end of said sheet of fabric which is free to move to apply a uniform layer of said coating composition to the surface of said sheet material.

Claim 14

A coating apparatus for coating sheet material with a liquid coating composition, said apparatus comprising (1) a reservoir for holding liquid coating composition; (2) a body of bibulous material in communication with said reservoir to receive coating composition therefrom, said body having an arcuate surface; (3) a sheet of fabric in conforming contact with the arcuate surface of said body of bibulous material to receive coating composition therefrom, said sheet of fabric being fixedly held at one end thereof and free at the opposite end thereof to move toward and away from said arcuate surface; and (4) means for advancing the sheet material to be coated in a direction tangential to said arcuate surface into contact with the end of said sheet of fabric which is free to move to apply a uniform layer of said coating composition to the surface of said sheet material.

Claim 15

A coating apparatus for coating sheet material with a liquid coating composition, said apparatus comprising (1) a frame; (2) a hollow cylinder supported by said frame having an inlet for receiving liquid coating composition and a longitudinal slot in the cylindrical surface thereof; (3) a supply tank for liquid coating composition connected to the inlet of said hollow cylinder; (4) a collecting pan for receiving excess liquid coating composition from said hollow cylinder, said collecting pan being supported by said frame and located directly beneath said hollow cylinder; (5) a layer of bibulous material partially surrounding the cylindrical outer surface of said hollow cylinder and covering said slot; (6) a sheet of fabric directly contiguous to said layer of bibulous material having one end fixedly secured and the opposite end free to move toward and away from said layer of bibulous material; the free end of said sheet of fabric being located proximate to said slot; and (7) means for advancing the sheet material to be coated in a direction tangential to the surface of said hollow cylinder into contact with the end of said sheet of fabric which is free to move to apply a uniform layer of said coating composition to the surface of said sheet material.

Claim 16

A coating apparatus for coating sheet material with a liquid coating composition, said apparatus comprising (1) a frame; (2) a hollow cylinder supported by said frame having an inlet for receiving liquid coating composition and a longitudinal slot in the cylindrical surface thereof; (3) a supply tank for liquid coating composition connected to the inlet of said hollow cylinder; (4) a collecting pan for receiving excess liquid coating composition from said hollow cylinder, said collecting pan being supported by said frame and located directly beneath said hollow cylinder; (5) a layer of bibulous material partially surrounding the cylindrical outer surface of said hollow cylinder and covering said slot; (6) a sheet of fabric directly contiguous to said layer of bibulous material having one end fixedly secured and the opposite end free to move toward and away from said layer of bibulous material; the free end of said sheet of fabric being located proximate to said slot; and (7) means for advancing the sheet material to be coated in a direction tangential to the surface of said hollow cylinder into contact with the end of said sheet of fabric which is free to move to apply a uniform layer of said coating composition to the surface of said sheet material.

Claim 17

Coating apparatus as defined in claim 12 wherein said layer of bibulous material is a sheet of felt and said sheet of fabric is a finely woven cotton fabric which has been folded over upon itself several times.

Claim 18

Coating apparatus as defined in claim 13 additionally comprising a liquid distributing cylinder positioned within said slotted cylinder to form an annular chamber for said liquid coating composition.

Claim 19

Coating apparatus as defined in claim 13 additionally comprising means for raising and lowering said hollow cylinder in relation to the path along which said sheet material is advanced.

Claim 20

Coating apparatus as defined in claim 12 wherein said means for advancing the sheet material comprises a pair of endless belts adapted to support said sheet material.

Claim 21

A coating apparatus for coating photographic glass plates with liquid anti-halation coating composition, said apparatus comprising (1) a hollow cylinder having an inlet for receiving the liquid anti-halation coating composition and a longitudinal slot in the cylindrical surface thereof; (2) a liquid distributing cylinder positioned within said slotted cylinder to form an annular chamber for said liquid anti-halation coating composition; (3) a layer of felt partially surrounding the cylindrical outer surface of said hollow cylinder and covering said slot; (4) a sheet of cotton fabric folded over upon itself to form five layers of fabric arranged in conforming contact with said layer of felt and positioned so that one end thereof is proximate to said slot; (5) a first clamping bar adapted to secure one end of said layer of felt in contact with the cylindrical surface of said hollow cylinder; (6) a second clamping bar adapted to hold a second end of said layer of felt in contact with the cylindrical surface of said hollow cylinder and to grip the end of said sheet of fabric which is remote from said slot and hold it against said layer of felt; (7) a liquid supply tank for anti-halation coating composition connected to the inlet to said hollow cylinder; (8) a gas supply connected to said liquid supply tank for exerting gaseous pressure on the liquid anti-halation coating composition contained therein; (9) a frame; (10) a pair of endless belts composed of a resilient material, each of said belts having an indented edge portion upon which an edge of each of a series of said photographic glass plates is adapted to rest and being supported by said frame for travel in a horizontal direction; (11) means for advancing said endless belts at a desired speed; (12) a collecting pan supported by said frame for receiving excess liquid anti-halation coating composition from said layer of felt; (13) means for mounting said hollow cylinder within said collecting pan at a position immediately beneath the path along which said glass plates are conveyed; and (14) a levelling screw connected to said collecting pan for raising and lowering said pan and thereby raising and lowering said hollow cylinder with respect to the path along which said glass plates are advanced; whereby liquid anti-halation coating composition is forced by said gaseous pressure from said liquid supply tank into said hollow cylinder and from said hollow cylinder into said layer of felt and then into said sheet of cotton fabric from which it is applied to the surface of each of said photographic glass plates.

Claim 22

A coating apparatus for coating photographic glass plates with liquid anti-halation coating composition, said apparatus comprising (1) a hollow cylinder having an inlet for receiving the liquid anti-halation coating composition and a longitudinal slot in the cylindrical surface thereof; (2) a liquid distributing cylinder positioned within said slotted cylinder to form an annular chamber for said liquid anti-halation coating composition; (3) a layer of felt partially surrounding the cylindrical outer surface of said hollow cylinder and covering said slot; (4) a sheet of cotton fabric folded over upon itself to form five layers of fabric arranged in conforming contact with said layer of felt and positioned so that one end thereof is proximate to said slot; (5) a first clamping bar adapted to secure one end of said layer of felt in contact with the cylindrical surface of said hollow cylinder; (6) a second clamping bar adapted to hold a second end of said layer of felt in contact with the cylindrical surface of said hollow cylinder and to grip the end of said sheet of fabric which is remote from said slot and hold it against said layer of felt; (7) a liquid supply tank for anti-halation coating composition connected to the inlet to said hollow cylinder; (8) a gas supply connected to said liquid supply tank for exerting gaseous pressure on the liquid anti-halation coating composition contained therein; (9) a frame; (10) a pair of endless belts composed of a resilient material, each of said belts having an indented edge portion upon which an edge of each of a series of said photographic glass plates is adapted to rest and being supported by said frame for travel in a horizontal direction; (11) means for advancing said endless belts at a desired speed; (12) a collecting pan supported by said frame for receiving excess liquid anti-halation coating composition from said layer of felt; (13) means for mounting said hollow cylinder within said collecting pan at a position immediately beneath the path along which said glass plates are conveyed; and (14) a levelling screw connected to said collecting pan for raising and lowering said pan and thereby raising and lowering said hollow cylinder with respect to the path along which said glass plates are advanced; whereby liquid anti-halation coating composition is forced by said gaseous pressure from said liquid supply tank into said hollow cylinder and from said hollow cylinder into said layer of felt and then into said sheet of cotton fabric from which it is applied to the surface of each of said photographic glass plates.