US4521355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing ceramic ware
Assignee: Toppan Inc
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Filing: 1983-09-19
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Granted: 1985-06-04
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Expires: 2003-09-19
Abstract
Abstract A method of producing decorative ceramic ware is disclosed. In the first step, a flocculant is added to an aqueous suspension containing as main solid components a fibrous material and a ceramic raw material clay, followed by preparing ceramic raw material sheets from the suspension by the ordinary paper-making method. Prepared are at least two kinds of ceramic raw material sheets differing from each other in color after firing. Then, the stacking-cutting operation of the sheets is performed at least once, in which the different kinds of sheets are alternately stacked, followed by cutting the stacked mass in a direction not parallel with the surface of the raw material sheet. The cut piece is formed into the desired shape and, then, dried and fired to produce a striped or checkered decorative ceramic ware. This particular method permits industrial production of ceramic ware.
Inventors
- 👤 Nobuyuki Kitajima
- 👤 Yoshinori Tachibana
- 👤 Asashi Muraki
- 👤 Shinichi Kuzuoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:10
CPC Classifications
C; C04; C04B; C04B33/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
175 words
A method of producing patterned ceramic ware, comprising the steps of adding a polymer flocculant and an inorganic flocculant to each of at least two different aqueous suspensions each containing a fibrous material, a ceramic raw clay and, as required, a colorant such as ceramic picturing pigment, so as to enable the clay, or both clay and colorant, to be adsorbed on the surface of the fibrous material; preparing from the suspensions, by the ordinary wet paper-making method, at least two kinds of ceramic raw material wet sheets differing from each other in color after firing; performing a stacking-cutting operation at least once, in which the different kinds of the wet sheets are alternately stacked; mechanically cutting the stacked wet sheets, using a cutter selected from a circular saw, a fretsaw and an ordinary saw, in a direction not parallel with the surface of the raw material sheet when the water content of the sheets is 20 to 50% by weight; forming the resultant sheet into a desired shape; and subsequently firing the shaped mass.
Claim 2
Independent Claim
175 words
A method of producing patterned ceramic ware, comprising the steps of adding a polymer flocculant and an inorganic flocculant to each of at least two different aqueous suspensions each containing a fibrous material, a ceramic raw clay and, as required, a colorant such as ceramic picturing pigment, so as to enable the clay, or both clay and colorant, to be adsorbed on the surface of the fibrous material; preparing from the suspensions, by the ordinary wet paper-making method, at least two kinds of ceramic raw material wet sheets differing from each other in color after firing; performing a stacking-cutting operation at least once, in which the different kinds of the wet sheets are alternately stacked; mechanically cutting the stacked wet sheets, using a cutter selected from a circular saw, a fretsaw and an ordinary saw, in a direction not parallel with the surface of the raw material sheet when the water content of the sheets is 20 to 50% by weight; forming the resultant sheet into a desired shape; and subsequently firing the shaped mass.
Claim 3
Dependent Claim
21 words
The method according to claim 1, wherein the amount of colorant added is at most 10% of the clay by weight.
Claim 4
Dependent Claim
20 words
The method according to claim 1, wherein said flocculant comprises a combination of a polyacrylamide-type polymer flocculant and aluminum sulfate.
Claim 5
Dependent Claim
22 words
The method according to claim 1, wherein each sheet, when dried, contains 50 to 98% of the ceramic raw clay by weight.
Claim 6
Dependent Claim
21 words
the method according to claim 1, wherein each sheet, when dried, contains 2 to 50% of the fibrous material by weight.
Claim 7
Independent Claim
182 words
A method of producing patterned ceramic ware, comprising the steps of adding a polymer flocculant and an inorganic flocculant to each of at least two different aqueous suspensions each containing a fibrous material, a ceramic raw clay and, as required, a colorant such as ceramic picturing pigment, so as to enable the clay, or both clay and colorant, to be adsorbed on the surface of the fibrous material; preparing from the suspensions, by the ordinary wet paper-making method, at least two kinds of ceramic raw material wet sheets differing from each other in color after firing; performing a stacking-cutting operation at least once, in which the different kinds of the wet sheets are alternately stacked; freezing the stacked wet sheets; mechanically cuting the frozen stacked sheets, using a cutter selected from a circular saw, a fretsaw and an ordinary saw, in a direction not parallel with the surface of the raw material sheet when the water content of the sheets is 20 to 50% by weight; forming the resultant sheet into a desired shape; and drying and subsequently firing the shaped mass.
Claim 8
Independent Claim
182 words
A method of producing patterned ceramic ware, comprising the steps of adding a polymer flocculant and an inorganic flocculant to each of at least two different aqueous suspensions each containing a fibrous material, a ceramic raw clay and, as required, a colorant such as ceramic picturing pigment, so as to enable the clay, or both clay and colorant, to be adsorbed on the surface of the fibrous material; preparing from the suspensions, by the ordinary wet paper-making method, at least two kinds of ceramic raw material wet sheets differing from each other in color after firing; performing a stacking-cutting operation at least once, in which the different kinds of the wet sheets are alternately stacked; freezing the stacked wet sheets; mechanically cuting the frozen stacked sheets, using a cutter selected from a circular saw, a fretsaw and an ordinary saw, in a direction not parallel with the surface of the raw material sheet when the water content of the sheets is 20 to 50% by weight; forming the resultant sheet into a desired shape; and drying and subsequently firing the shaped mass.
Claim 9
Dependent Claim
21 words
The method according to claim 6, wherein the amount of colorant added is at most 10% of the clay by weight.
Claim 10
Dependent Claim
20 words
The method according to claim 6, wherein said flocculant comprises a combination of a polyacrylamide-type polymer flocculant and aluminum sulfate.
Claim 11
Dependent Claim
22 words
The method according to claim 6, wherein each sheet, when dried, contains 50 to 98% of the ceramic raw clay by weight.
Claim 12
Dependent Claim
21 words
The method according to claim 6, wherein each sheet, when dried, contains 2 to 50% of the fibrous material by weight.
Claim 13
Dependent Claim
11 words
The patterned ceramic ware produced by the method of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |