EP0301842A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Information input sheet
Assignee: Toppan Edge Inc
•
Filing: 1988-07-27
•
Granted: —
•
Expires: 2008-07-27
Abstract
Abstract The structure of an information input sheet to be mounted on the information input board of a written information input terminal is provided. The information input sheet is constructed of a first flexible conductive layer (1 to 5) to which a pressure is directly applied by a writing utensil, a second conductive layer (6, 8) disposed facing the first conductive layer, and a plurality of insulators (7) disposed uniformely to define a space between the first and second conductive layers. The thickness of the first conductive layer is selected to be greater than an average distance between the edges of adjacent insulators, whereby as the first conductivity layer is deformed by a pen pressure, the first conductivity layer contacts the second conductivity layer while embracing some of the plurality of insulators.
Inventors
- 👤 Masafumi Moriwaki
- 👤 Shigeaki Sano
- 👤 Eiichi Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 17:11
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/045
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
155 words
An information input sheet comprising: a first flexible conductive layer (1 to 5); a second conductive layer (6, 8) mounted facing said first conductive layer; and a plurality of insulators (7) disposed uniformely between said first and second conductive layers to define a space therebetween, upon application of a pressure to the surface of said first conductive layer, said first conductive layer being deformed at the portion where said pressure is being applied and contacting said second conductive layer; wherein the thickness of said first conductive layer is selected so as to have substantially the same as or greater than an average distance between the edges of adjacent insulators, and substantially the same as or greater than an average width of said insulators, and whereby as said first conductive layer is deformed at the portion where said pressure is being applied and contacts said second conductive layer while embracing some of said plurality of insulators.
Claim 2
Dependent Claim
155 words
An information input sheet comprising: a first flexible conductive layer (1 to 5); a second conductive layer (6, 8) mounted facing said first conductive layer; and a plurality of insulators (7) disposed uniformely between said first and second conductive layers to define a space therebetween, upon application of a pressure to the surface of said first conductive layer, said first conductive layer being deformed at the portion where said pressure is being applied and contacting said second conductive layer; wherein the thickness of said first conductive layer is selected so as to have substantially the same as or greater than an average distance between the edges of adjacent insulators, and substantially the same as or greater than an average width of said insulators, and whereby as said first conductive layer is deformed at the portion where said pressure is being applied and contacts said second conductive layer while embracing some of said plurality of insulators.
Claim 3
Dependent Claim
19 words
An information input sheet according to claim 1, wherein said second conductive layer comprises a resistive layer (6, 8).
Claim 4
Dependent Claim
32 words
An information input sheet according to claim 2, wherein said plurality of insulators are fixedly connected to the surface of said first conductive layer (1 to 5) facing said second conductive layer.
Claim 5
Dependent Claim
38 words
An information input sheet according to claim 3, wherein said first conductive sheet (2) comprises a layer (2) made of a flexible material, and a layer (1) made of a conductive material for contacting said second conductive layer.
Claim 6
Dependent Claim
36 words
An information input sheet according to claim 3, wherein said layer (2) of said first conductive layer made of a flexible material includes a third conductive layer (3) for electrically shielding said second conductive layer (6).
Claim 7
Dependent Claim
110 words
An information input sheet according to claim 5, wherein said second conductive layer (6, 8) includes a substrate (8) and a resistive layer (6), and said layer (2) of said first conductive layer made of a flexible material includes said flexible layer (2), said third conductive layer (3) covering said flexible layer (2), a print sheet (4) covering the top surface of said third conductive layer, and a protective sheet (5) covering the top surface of said print sheet (4), and said information input sheet is constructed in a laminated structure of said second conductive layer (6, 8), said plurality of insulators (7) and said first flexible conductive layer (2).
Claim 8
Dependent Claim
44 words
An information input sheet according to claim 6, wherein the thickness of said layer made of flexible material and said protective sheet is selected to be in the range of 0.3 to 1.0 mm and in the range of 0.05 to 0.5 mm, respectively.
Claim 9
Dependent Claim
53 words
An information input sheet according to claim 7, wherein the Shore hardness of said layer made of a flexible material and said protective sheet is selected in the range of 65° to 95°, and said Shore hardness of said protective sheet is selected greater than that of said layer made of flexible material.
Claim 10
Dependent Claim
24 words
An information input sheet according to any one of claims 1 to 8, wherein said plurality of insulators are made of a flexible material.
Claim 11
Dependent Claim
34 words
An information input sheet according to any one of claims 1 to 9, wherein said plurality of insulators have said average distance between said edges and said average width which are substantially the same.
Claim 12
Dependent Claim
26 words
An information input sheet according to any one of claims 1 to 10, wherein said plurality of insulators are dot type insulators disposed independently and dispersedly.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.