Process for producing pressure-sensitive copying paper
AssigneeFuji Photo Film Co., Ltd.
InventorsHiroaki Nakamura, Shiro Kaneko, Takeshi Watanabe
Life of this patent
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Abstract
A process for producing a pressure-sensitive copying paper which comprises forming a single-layer, free-fall, vertical curtain of a coating solution containing microcapsules as a main component and coating the coating solution onto a continuously running web across the single-layer, free-fall, vertical curtain and a process for producing a pressure-sensitive copying paper which comprises forming a dual-layer, free-fall, vertical curtain of a coating solution containing microcapsules as a main component and a coating solution containing a color developer as a main component and coating the coating solutions onto a continuously running web across the dual-layer, free-fall, vertical curtain.
Claims20
A process for producing a pressure-sensitive copying paper which compries
- forming a single-layer, free-fall, vertical curtain of a coating solution containing microcapsules as a main component, said microcapsules containing a color former therein, and
- coating said coating solution onto a continuously running web by passing said running web through said single-layer, free-fall, vertical curtain.
A process for producing a pressure-sensitive copying paper which comprises
- forming a dual-layer, free-fall, vertical curtain of a layer of a coating solution containing microcapsules as a main component, said microcapsules containing a color former therein, and a layer of a coating solution containing a color developer as a main component, and
- coating said coating solutions onto a continuously running web by passing said running web through said dual-layer, free-fall, vertical curtain.
A process for producing a pressure-sensitive copying paper which comprises
- forming a first single-layer, free-fall, vertical curtain of a coating solution containing microcapsules as a main component, said microcapsules containing a color former therein, and a second single-layer, free-fall, vertical curtain of a coating solution containing a color developer as a main component, and
- coating said coating solution containing microcapsules as a main component onto a continuously running web by passing said running web through said first single-layer, free-fall, vertical curtain to form a coated layer, and
- then coating said coating solution containing a color developer as a main component onto the coated layer on said web in a superposed relationship while the previously formed coated layer on said web is in an undried and unsolidified state by passing said coated running web through said second single-layer, free-fall, vertical curtain.
Dependencies are inferred from the claim text.