US4398753A — Pressure sensitive recording unit

Claim 1

Independent Claim 142 words

A pressure sensitive recording unit comprising a single base web sheet and a colorless or light-colored methine-type dyestuff represented by the formula (I): ##STR8## wherein, X, Y and Z represent individually a phenyl, naphthyl, or β-styryl group or a residue of an aromatic heterocyclic ring which group or ring may optionally be substituted, X, Y and Z may be the same or different, and either two of X, Y and Z may be coupled together to form a ring, and an organic oxidizing compound selected from oxidizing quinone derivatives substituted by a multiplicity of electron attractive groups, both the dyestuff and the oxidizing compound being supported on the single base web sheet; or a combination of a first base web sheet on which said methine-type dyestuff is supported and a second base web sheet on which said organic oxidizing compound is supported.

Claim 2

Dependent Claim 142 words

A pressure sensitive recording unit comprising a single base web sheet and a colorless or light-colored methine-type dyestuff represented by the formula (I): ##STR8## wherein, X, Y and Z represent individually a phenyl, naphthyl, or β-styryl group or a residue of an aromatic heterocyclic ring which group or ring may optionally be substituted, X, Y and Z may be the same or different, and either two of X, Y and Z may be coupled together to form a ring, and an organic oxidizing compound selected from oxidizing quinone derivatives substituted by a multiplicity of electron attractive groups, both the dyestuff and the oxidizing compound being supported on the single base web sheet; or a combination of a first base web sheet on which said methine-type dyestuff is supported and a second base web sheet on which said organic oxidizing compound is supported.

Claim 3

Dependent Claim 25 words

The pressure sensitive recording unit according to claim 1, wherein the methine-type dyestuff is supported together with an alkanol amine on its base web sheet.

Claim 4

Dependent Claim 32 words

The pressure sensitive recording unit according to claim 1, wherein the methine-type dyestuff is supported together with an alkanol amine and a metal ion sequestering agent on its respective base web sheet.

Claim 5

Dependent Claim 130 words

A pressure sensitive recording unit comprising, in combination: (A) a first sheet carrying thereon a layer which contains (a) microscopic capsules enclosing a solution of a colorless or light-colored methine-type dyestuff represented by the general formula (I): ##STR9## wherein, X, Y and Z represent individually a phenyl, naphthyl, or β-styryl group or a residue of an aromatic heterocyclic ring which group or ring may optionally be substituted, X, Y and Z may be the same or different, and either two of X, Y and Z may be coupled together to form a ring, and (b) an alkanol amine and/or metal ion sequestering agent; and (B) a second sheet carrying thereon a layer containing an organic oxidizing compound selected from oxidizing quinone derivatives substituted by a multiplicity of electron attractive groups.

Claim 6

Dependent Claim 130 words

A pressure sensitive recording unit comprising, in combination: (A) a first sheet carrying thereon a layer which contains (a) microscopic capsules enclosing a solution of a colorless or light-colored methine-type dyestuff represented by the general formula (I): ##STR9## wherein, X, Y and Z represent individually a phenyl, naphthyl, or β-styryl group or a residue of an aromatic heterocyclic ring which group or ring may optionally be substituted, X, Y and Z may be the same or different, and either two of X, Y and Z may be coupled together to form a ring, and (b) an alkanol amine and/or metal ion sequestering agent; and (B) a second sheet carrying thereon a layer containing an organic oxidizing compound selected from oxidizing quinone derivatives substituted by a multiplicity of electron attractive groups.

Claim 7

Dependent Claim 130 words

A pressure sensitive recording unit comprising a single base web sheet; and a layer supported on a same surface of the single base web sheet and containing (a) microscopic capsules enclosing a colorless or light-colored solution of a methine-type dyestuff represented by the general formula (I): ##STR10## wherein, X, Y and Z represent individually a phenyl, naphthyl, or β-styryl group or a residue of an aromatic heterocyclic ring which group or ring may optionally be substituted, X, Y and Z may be the same or different, and either two of X, Y and Z may be coupled together to form a ring, (b) an alkanol amine and/or metal ion sequestering agent, and (c) an organic oxidizing agent selected from oxidizing quinone derivatives substituted by a multiplicity of electron attractive groups.

Claim 8

Dependent Claim 130 words

A pressure sensitive recording unit comprising a single base web sheet; and a layer supported on a same surface of the single base web sheet and containing (a) microscopic capsules enclosing a colorless or light-colored solution of a methine-type dyestuff represented by the general formula (I): ##STR10## wherein, X, Y and Z represent individually a phenyl, naphthyl, or β-styryl group or a residue of an aromatic heterocyclic ring which group or ring may optionally be substituted, X, Y and Z may be the same or different, and either two of X, Y and Z may be coupled together to form a ring, (b) an alkanol amine and/or metal ion sequestering agent, and (c) an organic oxidizing agent selected from oxidizing quinone derivatives substituted by a multiplicity of electron attractive groups.

Claim 9

Dependent Claim 34 words

The pressure sensitive recording unit according to any one of claims 1, 4 or 5, wherein the methine-type dyestuff has been microencapsulated as a solution of a hydrophobic solvent having a high boiling point.

Claim 10

Dependent Claim 17 words

The pressure sensitive recording unit according to claim 6, wherein the methine-type dyestuff is a triphenylmethane-type dyestuff.

Claim 11

Dependent Claim 27 words

The pressure sensitive recording unit according to any one of claims 1, 4 or 5, wherein the organic oxidizing compound has its oxidation-reduction potential at 0.4 eV.

Claim 12

Dependent Claim 23 words

The pressure sensitive recording unit according to any one of claims 1, 4 or 5, wherein the organic oxidizing compound is a 2,3,5,6-tetra-substituted-1,4-benzoquinone.

Claim 13

Dependent Claim 20 words

The pressure sensitive recording unit according to claim 4 or 5, wherein the alkanol amine is a tertiary alkanol amine.

Claim 14

Dependent Claim 25 words

The pressure sensitive recording unit according to claim 4 or 5, wherein the metal ion sequestering agent is a water-soluble organic metal ion sequestering agent.

Claim 15

Dependent Claim 20 words

The pressure sensitive recording unit according to claim 4 or 5, wherein the metal ion sequestering agent is a polyphosphate.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1986-08-15	1987-02-14	1987-08-16	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1990-08-15	1991-02-14	1991-08-16	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1994-08-15	1995-02-14	1995-08-16	$7700.00	Window Closed / Lapsed

Pressure sensitive recording unit

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