ES2430513R1 - PRINTER WITH INK DRYING DEVICE - Google Patents

Abstract

Printer with ink drying device. The printer comprises printing groups (10), each with a printing roller (1) arranged to print a water-based ink on a moving substrate (2) supported on a printing cylinder (3), and a drying device with drying boxes (4), each associated with at least one blowing nozzle (5) arranged to blow a stream of drying air on said substrate (2) current under one of the printing groups (10). The drying device comprises a dehumidifying device (6) that dehumidifies the drying air to be blown on the substrate (2).

Claims (2)

SPANISH OFFICE OF THE PATENTS AND BRAND Application no .: 201230576 SPAIN Date of submission of the application: 18.04.2012 Priority Date: REPORT ON THE STATE OF THE TECHNIQUE 51 Int. Cl.: B41F23 / 04 (2006.01) B41F13 / 00 (2006.01)  RELEVANT DOCUMENTS

Category

56 Documents cited Claims Affected

X

JP 2002086674 A (SAKATA INKS) 26.03.2002, paragraphs [0007-0010], [0021-0027]; figures. 1-3,6,8

X

JP H08192506 A (DAINIPPON PRINTING CO LTD) 30.07.1996, Summary of the EPODOC database. Recovered from EPOQUE; figures. 1,6,8

TO

4

X

JP 2011161840 A (FUJIFILM CORP) 08.25.2011, Summary of the EPODOC database. Recovered from EPOQUE; figures. 1.6

X

EP 2404757 A1 (HEIDELBERGER DRUCKMASCH AG) 11.01.2012, paragraphs [0005-0017]; figures. one

TO

2-6,8-10

TO

EP 1864800 A2 (HEIDELBERGER DRUCKMASCH AG) 12.12.2007, paragraphs [0022-0024]. 1.3-6.8

TO

US 2005253912 A1 (SMITH DAVID E et al.) 17.11.2005, paragraphs [0022-0028]. 4

Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

This report has been prepared • for all claims • for claims no:

Date of realization of the report 28.01.2014

Examiner G. Villarroel Álvaro Page 1/4

REPORT OF THE STATE OF THE TECHNIQUE Application number: 201230576 Minimum documentation sought (classification system followed by classification symbols) B41F Electronic databases consulted during the search (database name and, if possible, terms of search used) INVENES, EPODOC State of the Art Report Page 2/4 WRITTEN OPINION Application number: 201230576 Date of Written Opinion: 28.01.2014 Statement

Novelty (Art. 6.1 LP 11/1986)

Claims 2-5, 7-10 Claims 1, 6 IF NOT

Inventive activity (Art. 8.1 LP11 / 1986)

Claims Claims 1-10 IF NOT

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).  Opinion Base.- This opinion has been made on the basis of the patent application as published. State of the Art Report Page 3/4 WRITTEN OPINION Application number: 201230576  1. Documents considered.- The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Document

Publication or Identification Number publication date

D01

JP 2002086674 A (SAKATA INKS) 03.23.2002

D02

JP H08192506 A (DAINIPPON PRINTING CO LTD) 30.07.1996

D03

JP 2011161840 A (FUJIFILM CORP) 08.25.2011

D04

EP 2404757 A1 (HEIDELBERGER DRUCKMASCH AG) 11.01.2012

D05

EP 1864800 A2 (HEIDELBERGER DRUCKMASCH AG) 12.12.2007

D06

US 2005253912 A1 (SMITH DAVID E et al.) 11/17/2005

 2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement It is considered that the technical problem raised in the application is the control of the humidity of the air to be used in the drying device of a printer that uses water-based ink, all this given the degree of variability of the same depending on the time of the year and the corresponding environmental conditions. This problem has been solved in the state of the art, in the same way as in the patent application at hand, including in the drying air circuit a dehumidifier that removes excess moisture from the air to optimize drying and the proper print job In the state of the art report some examples of printing processes are mentioned in which a humidity control has been included, either with a dehumidifier or another, since there are numerous means of eliminating moisture from the air as you can be, for example, water condensers similar to those used in document D04. Document D01 is considered relevant as it consists of rapid drying of the printed ink, this being water-based, on substrates such as plastic film, even in high humidity environments such as in the rainy seasons. In this case, an air drying device (8) containing a dehumidifying rotor is incorporated (24) consisting of a rotating drum composed of a matrix mainly of inorganic fibers (47) arranged around the horizontal axis of rotation of the drum (23) and an absorbent (48) formed of a metal silicate aerosol. Rotating such a dehumidifier ensures that the moisture contained in the air is extracted and therefore the air dries. It is subsequently heated and supplied to the printed substrate for drying the aqueous ink (6). According to the previous description, this document has the same object as the one of the application, also having the options of including a single dehumidifier (8) with an air line (9) that feeds all the printing units (4a, 4b , 4c) through its drying boxes (7a, 7b, 7c) as can be seen in figure 1, or a dehumidifying unit for each printing unit (8a, 8b, 8c) as seen in figure 2 of this document. Document D02, consisting of an efficient mode of drying ink in a rotogravure rotary printing machine, includes a device for conditioning the outside air that is blown to the printed elements, so that the humidity and temperature thereof are measured and the amount to be spread is calculated. To control these characteristics, a hot air generator (13) is also included. Document D03 discloses a liquid drying system applied to a printed substrate to which it is subjected to a stream of heated air after having been dehumidified to obtain an improvement in image quality. Document D04 as already mentioned above, comprises a device in which condensers are installed near the drying units to dehumidify the air they use, although this offset printing machine further describes other elements that do not affect the requested invention. As has been seen, the documents found also include means for heating the dehumidified air since in this way drying is optimized. Regarding the inclusion of humidity sensors, it is considered obvious to one skilled in the art given the problem posed, as well as the associated electronic control devices that are a design option. See for example documents D05 or D06. However, in the documents cited there is no provision in which the dehumidified air is applied to a drying tunnel through which the substrate passes, although, it is considered that a dehumidified and subsequently heated air circuit is perfectly introducible in such a tunnel and also applicable to printing machines in which cylinders of either rotogravure (as in document D02) or flexography, offset or others are used, regardless of their arrangement around a central drum or in successive groups. Based on the foregoing, it is concluded that claims 1 and 6 do not have novelty according to article 6.1 of patent law 11/1986, and that claims 1 to 10 do not possess inventive activity according to article 8.1 of the same law . State of the Art Report Page 4/4