Image-forming device and method for applying varnish

Patent metadata

Field	Value
Publication number	US-2017355201-A1
Application number	US-201715619545-A
Country	US
Kind code	A1
Filing date	Jun 12, 2017
Priority date	Jun 13, 2016
Publication date	Dec 14, 2017
Grant date	—

Abstract

An image-forming device includes a printing portion that forms images on the media being transported using ink, a varnish application portion that applies aqueous varnish to the media on which the images are formed, a treatment portion that performs a treatment on the media so that a stickiness evaluation value which is a stickiness evaluation value indicating a degree of stickiness of the aqueous varnish applied to the media when the media to which the aqueous varnish is applied are output from the varnish application portion and is derived using a damped vibration percentage of a pendulum caused to do pendulum motions from an arbitrary location of the media to which the aqueous varnish is applied as a pivot reaches 0.24 or less, and an accumulation portion that accumulates the media to which the aqueous varnish is applied and on which the treatment is performed.

First claim

What is claimed is:

1 . An image-foil ling device, comprising:
a medium transport portion that transports media in a medium transport direction; a printing portion that forms images on the media being transported using ink; a varnish application portion that applies aqueous varnish to the media on which the images are formed; a treatment portion that carries out a treatment on the media so that a stickiness evaluation value reaches 0.24 or less which is the stickiness evaluation value indicating a degree of stickiness of the aqueous varnish applied to the media when the media to which the aqueous varnish is applied are output from the varnish application portion and being derived using a damped vibration percentage of a pendulum caused to do pendulum motions from an arbitrary location of the media to which the aqueous varnish is applied as a pivot; and an accumulation portion that accumulates the media to which the aqueous varnish is applied using the varnish application portion and on which the treatment is carried out using the treatment portion.

2 . The image-forming device according to claim 1 ,
wherein the treatment portion carries out a treatment on the media so that the stickiness evaluation value reaches less than 0.20.

3 . The image-forming device according to claim 1 , further comprising
a first temperature detection portion which is disposed at a location on a downstream side of the printing portion in the medium transport direction and at a location on an upstream side of the varnish application portion in the medium transport direction and detects temperatures of the media on which the images are formed using the printing portion and the aqueous varnish is to be applied using the varnish application portion, wherein the treatment portion includes a drying treatment portion which is disposed at a location on the downstream side of the printing portion in the medium transport direction and at a location on the upstream side of the varnish application portion in the medium transport direction and carries out a drying treatment on the media on which the images are formed using the printing portion and the aqueous varnish is to be applied using the varnish application portion and a drying treatment control portion that controls temperatures of the media on which the drying treatment is carried out using the drying treatment portion by applying drying conditions under which the stickiness evaluation value of the media to which the aqueous varnish is to be applied using the varnish application portion reaches 0.24 or less.

4 . The image-forming device according to claim 3 ,
wherein the drying treatment control portion controls operation of the drying treatment portion by applying drying conditions under which the temperatures of the media which are detected using the first temperature detection portion reach 101° C. or higher.

5 . The image-forming device according to claim 3 , further comprising
a second temperature detection portion which is disposed at a location on the downstream side of the varnish application portion in the medium transport direction and at a location on the upstream side of the accumulation portion in the medium transport direction and detects temperatures of the media on which the aqueous varnish is applied using the varnish application portion and which are to be accumulated in the accumulation portion, wherein the treatment portion includes a cooling treatment portion which is disposed at a location on the downstream side of the varnish application portion in the medium transport direction and at a location on the upstream side of the accumulation portion in the medium transport direction and carries out a cooling treatment on the media to which the varnish is applied using the varnish application portion and a cooling treatment control portion that controls temperatures of the media on which the cooling treatment is carried out using the cooling treatment portion by applying cooling conditions under which the stickiness evaluation value of the media to which the aqueous varnish is to be applied using the varnish application portion reaches less than 0.24.

6 . The image-forming device according to claim 5 ,
wherein the cooling treatment control portion controls operation of the cooling treatment portion by applying cooling conditions under which the temperatures of the media which are detected using the second temperature detection portion reach 40° C. or lower.

7 . The image-forming device according to claim 1 ,
wherein the treatment portion includes a transfer treatment portion that transfers the media on which the images are formed using the printing portion and to which the varnish is to be applied in the varnish application portion and a transfer condition setting portion that sets conditions under which an environment temperature is 15° C. or higher and 35° C. or lower, an environmental relative humidity is 35 percent or higher and 65 percent or lower, and a transfer period is ten minutes or longer as transfer conditions in the transfer treatment portion.

8 . The image-forming device according to claim 1 ,
wherein the treatment portion includes a transfer treatment portion that transfers the media on which the images are formed using the printing portion and to which the varnish is to be applied in the varnish application portion and a transfer condition setting portion that sets conditions under which an environment temperature is 50° C. or higher and a transfer period is 90 seconds or longer as transfer conditions in the transfer treatment portion.

9 . The image-forming device according to claim 1 ,
wherein the treatment portion includes a transfer treatment portion that transfers the media on which the images are formed using the printing portion and to which the varnish is to be applied in the varnish application portion and a transfer condition setting portion that sets conditions under which an environment temperature is 60° C. or higher and a transfer period is ten seconds or longer as transfer conditions in the transfer treatment portion.

10 . The image-forming device according to claim 3 ,
wherein the treatment portion includes a powder spraying portion that sprays powder to the media treated using the treatment portion and a powder spraying control portion that sprays powder to the media treated using the treatment portion using the powder spraying portion in a case in which the temperatures of the media detected using the first temperature detection portion are lower than 101° C.

11 . The image-forming device according to claim 5 ,
wherein the treatment portion includes a powder spraying portion that sprays powder to the media treated using the treatment portion and a powder spraying control portion that sprays powder to the media treated using the treatment portion using the powder spraying portion in a case in which the temperatures of the media detected using the second temperature detection portion exceeds 40° C.

12 . The image-forming device according to claim 1 ,
wherein the ink contains a solvent having an SP value of 25 (MPa) 1/2 or more.

13 . The image-forming device according to claim 1 ,
wherein the ink contains a solvent having a molecular weight of 100 or less.

14 . A method for applying varnish, comprising:
a printing step of forming images on media using ink; a varnish application step of applying aqueous varnish to the media on which images are formed using the printing step using a varnish application portion; a treatment step of carrying out a treatment on the media so that a stickiness evaluation value reaches 0.24 o

Assignees

• Fujifilm Corp

Inventors

• Hojo Hiroaki

Classifications

• B41J11/002

  Curing or drying the ink on the copy materials, e.g. by heating or irradiating · CPC title

• B41M7/02

  Dusting {, e.g. with an anti-offset powder for obtaining raised printing such as by thermogravure (B41M7/0027, B41M7/0036, B41M7/0045, B41M7/0054, B41M7/0072, B41M7/0081, B41M7/009 take precedence); Varnishing (devices for treating the surfaces of sheets, webs, or other articles in connection with printing B41F23/00, B41L23/00)} · CPC title

• B41J29/38

  Drives, motors, controls or automatic cut-off devices for the entire printing mechanism · CPC title

• B41J11/0015 Primary

  for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing (selective coating B41J2/2114) · CPC title

• B41J29/377

  Cooling or ventilating arrangements · CPC title