US4230743A — Process for producing pressure-sensitive copying …

Claim 1

Independent Claim 54 words

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.

Claim 2

Dependent Claim 54 words

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.

Claim 3

Dependent Claim 72 words

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.

Claim 4

Dependent Claim 72 words

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.

Claim 5

Dependent Claim 140 words

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.

Claim 6

Dependent Claim 140 words

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.

Claim 7

Dependent Claim 20 words

The process of claim 1, wherein said single-layer, free-fall, vertical curtain has a height of less than about 40 cm.

Claim 8

Dependent Claim 20 words

The process of claim 1, wherein said microcapsules have an average particle size of about 0.1 to about 100 microns.

Claim 9

Dependent Claim 28 words

The process of claim 2, wherein said color developer is an electron-accepting or proton-donating material and causes a color to be formed on contact with a color former.

Claim 10

Dependent Claim 22 words

The process of claim 6, wherein said color developer is a clay, a phenol resin or an aromatic carboxylic acid metal salt.

Claim 11

Dependent Claim 108 words

The process of claim 7, wherein said aromatic carboxylic acid has the general formula (I): ##STR2## wherein R 1 , R 2 , R 3 , R 4 and R 5 each represents a hydrogen atom, a hydroxy group, a halogen atom, an amino group, an alkylamino group, a nitro group, an aldehyde group, an alkyl group, a cycloalkyl group, an aryl group, an alkylaryl group, an aralkyl group, or an alkoxy group, the aforesaid group containing 18 carbon atoms or less; and two of R 1 , R 2 , R 3 , R 4 and R 5 in adjacent positions can combine to form a ring.

Claim 12

Dependent Claim 12 words

The process of claim 8, wherein R 5 is a hydroxy group.

Claim 13

Dependent Claim 30 words

The process of claim 1, wherein the coating amount of said coating solution containing microcapsules as a main component is greater than about 4 g/m 2 on a dry basis.

Claim 14

Dependent Claim 16 words

The process of claim 10, wherein said coating amount is 5 to 8 g/m 2 .

Claim 15

Dependent Claim 37 words

The process of claim 2, wherein said color developer is a clay and the coating amount of said coating solution containing said clay color developer as a main component is greater than about 4 g/m 2 .

Claim 16

Dependent Claim 16 words

The process of claim 12, wherein said coating amount is 5 to 8 g/m 2 .

Claim 17

Dependent Claim 44 words

The process of claim 2, wherein said color developer is a phenol resin or an aromatic carboxylic acid metal salt and the coating amount of said coating solution containing said color developer as a main component is greater than about 0.5 g/m 2 .

Claim 18

Dependent Claim 16 words

The process of claim 14, wherein said coating amount is 0.8 to 3 g/m 2 .

Claim 19

Dependent Claim 17 words

The process of claim 1 wherein said coating solution containing microcapsules does not contain a protective agent.

Claim 20

Dependent Claim 28 words

The process of claim 3, wherein said color developer is an electron-accepting or proton-donating material and causes a color to be formed on contact with a color former.

Claim 21

Dependent Claim 24 words

The process of claim 1, wherein said color former is an electron-donating or proton-accepting material forming a color on contact with a color developer.

Claim 22

Dependent Claim 24 words

The process of claim 2, wherein said color former is an electron-donating or proton-accepting material forming a color on contact with a color developer.

Claim 23

Dependent Claim 24 words

The process of claim 3, wherein said color former is an electron-donating or proton-accepting material forming a color on contact with a color developer.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1983-10-28	1984-04-28	1984-10-28	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1987-10-28	1988-04-28	1988-10-28	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1991-10-28	1992-04-28	1992-10-28	$7700.00	Window Closed / Lapsed

Process for producing pressure-sensitive copying paper

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