EP0092988A2 - Offsetdruck - Google Patents

Offsetdruck Download PDF

Info

Publication number: EP0092988A2
Authority: EP; European Patent Office
Prior art keywords: ink; intermediate surface; pad; silicone rubber; rubber
Prior art date: 1982-04-24
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP83302297A

Other languages

English (en)

French (fr)

Other versions

EP0092988B1 (de

EP0092988A3 (en

Inventor

John Frederick Birtles

Robert Dennis Brett

Wilfred Roberts

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

British Ceramic Research Association Ltd

Original Assignee

British Ceramic Research Association Ltd

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1982-04-24

Filing date

1983-04-22

Publication date

1983-11-02

1983-04-22 Application filed by British Ceramic Research Association Ltd filed Critical British Ceramic Research Association Ltd

1983-11-02 Publication of EP0092988A2 publication Critical patent/EP0092988A2/de

1985-05-22 Publication of EP0092988A3 publication Critical patent/EP0092988A3/en

1990-06-20 Application granted granted Critical

1990-06-20 Publication of EP0092988B1 publication Critical patent/EP0092988B1/de

Status Expired legal-status Critical Current

Links

Images

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/40—Printing on bodies of particular shapes, e.g. golf balls, candles, wine corks

Definitions

This invention relates to repetitive off-set printing processes of the kind in which a deformable pad is employed to transfer an ink design to an article.
Off-set transfer pad processes for printing onto complex shapes are well established in the ceramic, plastics, toy and packaging industries. The majority of these processes use a deformable gelatine or silicone rubber pad to transfer an ink design from an intaglio metal plate to the items to be decorated or marked.
the metal plate can be engraved or etched.
U.K. Patent Specification 737 461 has proposed replacing the intaglio metal plate by a silk screen and an intermediate flat surface.
the ink design is applied to the intermediate flat surface by screen printing and then transferred to the item to be marked or decorated by means of the deformable pad.
the intermediate surface can be any non-absorbent material, and examples of metal or glass were given.
the ink film on the intermediate surface split on removal of the deformable pad from the intermediate surface. The result was that the design ink spread with successive prints and there was a loss of definition.
the present invention stems from attempts to provide . an improved off-set printing process, where the ink design on the intermediate surface is transferred substantially completely to the item to be marked or decorated by the deformable pad.
the basis for the present invention lies in our discovery that the relative affinity of an ink for the intermediate surface, deformable pad and work piece can be controlled by the use of two dissimilar silicone rubbers for pad and intermediate surface, the silicone rubbers differing in the catalysts that are employed in curing of the rubbers.
U.S. Specification No. 4,261,749 is concerned with a thermoplastic ink formulation for use in an off-set process in which an ink design is applied to a silicone elastomer intermediate surface and is then transferred to the ware by a further silicone elastomer. It is stated at lines 47 to 51 of column 4 that 'it is highly desirable to have as great a difference in surface energy as possible between the two silicone surfaces in order to facilitate ink release from one to the other', but no details are given of what rubbers are to be employed. It would appear that it was contemplated to provide different surface energies by employing different compositions of rubber, such as by varying the phenyl/methyl ratio as was previously known.
U.S. Specification No. 4 261 749 is concerned with devising an ink formulation to accommodate changes in ink affinity of the silicone rubber surfaces which occur in use, whereas the present invention is concerned with providing substantially stable ink affinities of the two surfaces, so that the silicone rubber surfaces rarely, if ever, require replacement to alter ink affinity.
a repetitive off-set printing process in which an ink design is first applied to an intermediate surface from which it is then transferred to an article by a deformable pad, the intermediate surface and the pad being formed of first and second silicone rubbers respectively, the first and second rubbers employing different catalysts in the curing thereof, and the catalysts being chosen such that the affinity of the first silicone rubber for the ink is substantially less than the affinity of the second silicone rubber for the ink.
the intermediate surface is preferably flat.
the ink design may be applied to the intermediate surface by any suitable method. Preferably silk screening will be employed, but other stencilling operations may be used.
condensation type silicone rubbers having a wide range of ink affinities can be produced by employing as catalysts the carboxylic acid salts of various metals such as Pb, Zn, Zr, Sb, Fe, Cd, Sn, Ba, Ca, and Mn.
ink affinities is provided by the following list of salts: metal naphthenates, octoates, hexoates, laurates and acetates, the ink affinity generally reducing through the list.
silicone rubbers of the condensation type and using dibutyltindilaurate as the catalyst in the curing process, have much less affinity for ink than condensation cure rubbers using most other catalysts in the curing process or addition cure rubbers.
a stabilised dibutyltindilaurate catalysed silicone rubber provides an . ideal material for the intermediate surface. It is able to accept ink from the silk screen to form a design of high definition but then, on subsequent pressure contact from a deformable pad of a suitably dissimilar silicone rubber, due to differences in ink affinity, it gives up the ink design 100% to the pad.
An electrically heated metal screen is conveniently used, but an externally heated screen may be employed.
the ink should be compatible with the silicone rubber of both transfer pad and intermediate surface and not induce significant deterioration in either during the period of printing. It has been found that inks meeting all the above criteria are preferably composed of a solid resin, a liquid resin, a wax and a ceramic pigment.
the wax should have a melting point below the desired silk-screen temperature and the solid resin a melting point above this temperature. Viscosity control at the silk screen is effected by adjustment to the solid/liquid resin ratio and tack at the transfer stage by the wax to total resin ratio.
an off-set printing machine suitable for use in printing onto the curved surface of an article comprises an intermediate surface, means for applying an ink design to the intermediate surface, a deformable pad, means for bringing the deformable pad into register with the intermediate surface to pick up the ink design, and means for bringing the pad carrying the ink design into register with the article to transfer the ink design to the article;
the intermediate surface and the pad being formed of first and second silicone rubbers respectively, the first and second rubbers employing different catalysts in the curing thereof, and the catalysts being chosen such that the affinity of the first silicone rubber for ink is substantially less than the affinity of the second silicone rubber for the ink.
an electrically heated metal screen and an ink formulation are employed such that, at the temperature of the screen, the ink viscosity is correct for screen printing.
the ink in the form of the required design is screened onto the intermediate surface of stabilised dibutyltindilaurate catalysed silicone rubber which is heated to a lower temperature than the screen, such that after screening the tack properties of the ink dominate.
a deformable pad of dissimilar silicone rubber for example addition cured or octoate-catalysed condensation cured, is used to pick up the ink design 100% from the intermediate surface. In the final stage of the operation the pad transfers the ink design 100% to the work piece.
the process is illustrated diagrammatically in the accompanying single Figure in which the reference numeral 1 designates the heated silk screen, 2 designates the ink design, 3 designates the heated intermediate surface, 4 designates the deformable pad, and 5 designates the work piece.
Rhodia Ltd. Hulton House 161-166 Fleet Street LONDON EC4 2DP
Rhodia Ltd. Hulton House 161-166 Fleet Street LONDON EC4 2DP
Example (B1) or (B2) is produced as a thin uniform layer, 0.5 to 5 mms in thickness, on a metal backing. Following fabrication and cure the rubber is stabilised by heat treating for 4 h. at 110°C.
the ink is produced by intimate mixing either by bead or triple roll mill.

Landscapes

Printing Methods (AREA)
Inks, Pencil-Leads, Or Crayons (AREA)

EP19830302297 1982-04-24 1983-04-22 Offsetdruck Expired EP0092988B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GB8211917		1982-04-24
GB8211917		1982-04-24

Publications (3)

Publication Number	Publication Date
EP0092988A2 true EP0092988A2 (de)	1983-11-02
EP0092988A3 EP0092988A3 (en)	1985-05-22
EP0092988B1 EP0092988B1 (de)	1990-06-20

Family

ID=10529934

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19830302297 Expired EP0092988B1 (de)	1982-04-24	1983-04-22	Offsetdruck

Country Status (4)

Country	Link
EP (1)	EP0092988B1 (de)
JP (1)	JPS5926264A (de)
DE (1)	DE3381677D1 (de)
GB (1)	GB2118900B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0106543A3 (de) *	1982-09-17	1985-05-22	Corning Glass Works	Sammelmembran
EP0365135A1 (de) *	1988-09-23	1990-04-25	Service (Engineers) Plc	Mehrfarbiger Offset-Druck
FR2705277A1 (fr) *	1993-05-14	1994-11-25	Elmetherm	Installation de décoration de pièces, notamment en céramique ou verre, à l'aide de chromos ou de motifs à l'encre et procédé de fonctionnement.
EP0662683A1 (de) *	1994-01-07	1995-07-12	Pilkington Plc	Substrat für eine Magnetplatte und Herstellungsverfahren dafür
CN102378692A (zh) *	2009-04-01	2012-03-14	株式会社秀峰	印刷方法及被印刷体
DE102021000892A1 (de)	2021-02-19	2022-08-25	Giesecke+Devrient Currency Technology Gmbh	Sicherheitselement mit bei IR-Beleuchtung transparenten Druckfarben und einem maschinenlesbaren Merkmal

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3554836A (en) *	1968-07-19	1971-01-12	Minnesota Mining & Mfg	Transfer process
CH527699A (de) *	1969-08-02	1972-09-15	Philipp Wilfried	Druckverfahren und Vorrichtung zur Durchführung des Druckverfahrens

1983
- 1983-04-22 EP EP19830302297 patent/EP0092988B1/de not_active Expired
- 1983-04-22 DE DE8383302297T patent/DE3381677D1/de not_active Expired - Fee Related
- 1983-04-22 GB GB08311031A patent/GB2118900B/en not_active Expired
- 1983-04-25 JP JP7277883A patent/JPS5926264A/ja active Granted

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0106543A3 (de) *	1982-09-17	1985-05-22	Corning Glass Works	Sammelmembran
EP0365135A1 (de) *	1988-09-23	1990-04-25	Service (Engineers) Plc	Mehrfarbiger Offset-Druck
FR2705277A1 (fr) *	1993-05-14	1994-11-25	Elmetherm	Installation de décoration de pièces, notamment en céramique ou verre, à l'aide de chromos ou de motifs à l'encre et procédé de fonctionnement.
EP0662683A1 (de) *	1994-01-07	1995-07-12	Pilkington Plc	Substrat für eine Magnetplatte und Herstellungsverfahren dafür
US5499731A (en) *	1994-01-07	1996-03-19	Pilkington Plc	Substrate for a magnetic disc and manufacture thereof
US5681636A (en) *	1994-01-07	1997-10-28	Pilkington Plc	Magnetic recording disc substrate having a surface texture of non overlapping circular sub-arrays
CN102378692A (zh) *	2009-04-01	2012-03-14	株式会社秀峰	印刷方法及被印刷体
US8893617B2 (en)	2009-04-01	2014-11-25	Shuhou Co., Ltd.	Printing method and to-be-printed object
CN102378692B (zh) *	2009-04-01	2015-01-14	株式会社秀峰	印刷方法及被印刷体
DE102021000892A1 (de)	2021-02-19	2022-08-25	Giesecke+Devrient Currency Technology Gmbh	Sicherheitselement mit bei IR-Beleuchtung transparenten Druckfarben und einem maschinenlesbaren Merkmal

Also Published As

Publication number	Publication date
JPH0346307B2 (de)	1991-07-15
EP0092988B1 (de)	1990-06-20
JPS5926264A (ja)	1984-02-10
DE3381677D1 (de)	1990-07-26
GB2118900A (en)	1983-11-09
EP0092988A3 (en)	1985-05-22
GB2118900B (en)	1985-10-23
GB8311031D0 (en)	1983-05-25

Legal Events

Date	Code	Title	Description
1983-09-02	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1983-11-02	AK	Designated contracting states	Designated state(s): DE FR IT LU NL SE
1985-03-19	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1985-05-22	AK	Designated contracting states	Designated state(s): DE FR IT LU NL SE
1986-01-15	17P	Request for examination filed	Effective date: 19851025
1987-03-25	17Q	First examination report despatched	Effective date: 19870206
1987-08-12	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: BRITISH CERAMIC RESEARCH LIMITED
1990-05-05	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1990-06-20	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): DE FR IT LU NL SE
1990-06-21	ITF	It: translation for a ep patent filed
1990-07-26	REF	Corresponds to:	Ref document number: 3381677 Country of ref document: DE Date of ref document: 19900726
1990-08-10	ET	Fr: translation filed
1991-04-20	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1991-04-20	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1991-04-30	ITTA	It: last paid annual fee
1991-06-12	26N	No opposition filed
1994-05-06	EPTA	Lu: last paid annual fee
1995-01-31	EAL	Se: european patent in force in sweden	Ref document number: 83302297.3
1998-04-06	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: LU Payment date: 19980406 Year of fee payment: 16
1999-04-22	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19990422
2001-04-12	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: SE Payment date: 20010412 Year of fee payment: 19
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2002-04-23	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020423
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2003-01-06	NLV4	Nl: lapsed or anulled due to non-payment of the annual fee	Effective date: 20021101
2003-02-07	REG	Reference to a national code	Ref country code: FR Ref legal event code: ST

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US4445432A (en)	1984-05-01	Article decorating
US3255695A (en)	1966-06-14	Method of printing and apparatus therefor
EP0337018B1 (de)	1993-01-13	Verfahren zur Herstellung eines Druckfarbenbildes und Abdrucke desselben
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