Ink printing apparatus, and method to operate an ink printing apparatus

Patent metadata

Field	Value
Publication number	US-2016129698-A1
Application number	US-201514936892-A
Country	US
Kind code	A1
Filing date	Nov 10, 2015
Priority date	Nov 11, 2014
Publication date	May 12, 2016
Grant date	—

Abstract

In a method to operate an ink printing apparatus, and in an ink printing apparatus, a recording medium is directed through a printer. The recording medium is subsequently supplied to a dryer having at least one heating saddle and a drying channel arranged at the heating saddle. In the dryer the recording medium is directed past the heating saddle. A negative pressure is generated in the drying channel via an air exhaust arranged at one end of the drying channel. In the printing operation, in a region of the heating saddle a negative pressure is exerted on the recording medium in a direction of the heating saddle so that the heating saddle is then in contact with the recording medium in order to dry the ink on the recording medium. Upon interruption of the printing operation with braking of the recording medium, the negative pressure in the direction of the heating saddle is deactivated at a beginning of the braking.

First claim

1 . An ink printing apparatus, comprising:
a printer for printing to a recording medium; a dryer arranged at an exit of the printer, said dryer having at least one heating saddle and a drying channel arranged at said heating saddle via which the recording medium is directed past the heating saddle; said dryer having a negative pressurer in a region of the heating saddle, the negative pressurer being designed such that in a printing operation the pressurer exerts a negative pressure on the recording medium in a direction of the heating saddle such that the heating saddle is then in contact with the recording medium in order to dry the ink on said recording medium; said dryer also having an air exhaust at one end of the drying channel, said air exhaust creating a negative pressure in the drying channel; and the negative pressurer deactivating the negative pressure at a beginning of a stop ramp during which the recording medium is brought to a standstill upon interruption of the printing operation with braking of the recording medium, and the air exhaust increases its power relative to a power of the air exhaust during printing operation after said interruption of the printing operation, so that a heat transfer from the heating saddle to the recording medium is interrupted.

2 . The ink printing apparatus according to claim 1 in which the negative pressurer comprises a channel introduced into the heating saddle and a negative pressure source at an entrance of the channel.

3 . The ink printing apparatus according to claim 2 in which the channel in the heating saddle has a negative pressure channel connected with the negative pressure source; through-holes connected with the negative pressure channel; and grooves leading to a surface of the heating saddle, said grooves being connected with the through-holes.

4 . The ink printing apparatus according to claim 2 in which the negative pressure source comprises a negative pressure blower.

5 . The ink printing apparatus according to claim 1 in which the air exhaust comprises an air exhaust blower.

6 . The ink printing apparatus according to claim 5 in which the dryer deactivates the air exhaust blower when the recording medium has reached said standstill after said interruption of said printing operation.

7 . The ink printing apparatus according to claim 5 in which the air exhaust blower is arranged at an entrance of the drying channel as viewed in a transport direction of the recording medium such that via the blower an air exhaust flow is drawn through the drying channel.

8 . The ink printing apparatus according to claim 7 in which the drying channel is formed by the heating saddle and a side wall of the dryer.

9 . A method to operate an ink printing apparatus, comprising the steps of:
directing a recording medium through a printer; subsequently supplying the recording medium to a dryer having at least one heating saddle and a drying channel arranged at said heating saddle, and in the dryer, the recording medium being directed past the heating saddle; generating a negative pressure in the drying channel via an air exhaust arranged at one end of said drying channel; in the printing operation, with a negative pressurer exerting a negative pressure in a region of the heating saddle on the recording medium in a direction of said heating saddle so that the heating saddle is then in contact with the recording medium in order to dry the ink on said recording medium; and upon interruption of the printing operation with braking of the recording medium to a standstill in a stop ramp with the negative pressurer deactivating the negative pressure at a beginning of the stop ramp, and increasing a power of the air exhaust relative to a power for the printing operation after the interruption of the printing operation, so that heat transfer from the heating saddle to the recording medium is interrupted.

10 . An ink printing apparatus, comprising:
a printer for printing to a recording medium; a dryer arranged at an exit of the printer, said dryer having at least one heating saddle and a drying channel arranged at said heating saddle via which the recording medium is directed past the heating saddle; said dryer having a negative pressurer in a region of the heating saddle, the negative pressurer being designed such that in a printing operation the pressurer exerts a negative pressure on the recording medium in a direction of the heating saddle such that the heating saddle is then in contact with the recording medium in order to dry the ink on said recording medium; said dryer also having an air exhaust at one end of the drying channel, said air exhaust creating a negative pressure in the drying channel; and the negative pressurer deactivating the negative pressure substantially at a beginning of a stop ramp during which the recording medium is brought to a standstill upon interruption of the printing operation with braking of the recording medium so that a heat transfer from the heating saddle to the recording medium is interrupted.

11 . A method to operate an ink printing apparatus, comprising the steps of:
directing a recording medium through a printer; subsequently supplying the recording medium to a dryer having at least one heating saddle and a drying channel arranged at said heating saddle, and in the dryer, the recording medium being directed past the heating saddle; generating a negative pressure in the drying channel via an air exhaust arranged at one end of said drying channel; in the printing operation, exerting a negative pressure in a region of the heating saddle on the recording medium in a direction of said heating saddle so that the heating saddle is then in contact with the recording medium in order to dry the ink on said recording medium; and deactivating the negative pressure substantially at a beginning of a stop ramp during which the recording medium is brought to a standstill upon interruption of the printing operation with braking of the recording medium so that a heat transfer from the heating saddle to the recording medium is interrupted.

Assignees

• Oce Printing Systems Gmbh & Co Kg

Inventors

• Biglari Mehrad
• Heimbach Robert

Classifications

• B41J2/14088

  Structure of heating means · CPC title

• B41J11/0085

  Using suction for maintaining printing material flat (on rotatable drums B41J13/226) · CPC title

• B41J29/377

  Cooling or ventilating arrangements · CPC title

• B41J2/355

  Control circuits for heating-element selection · CPC title

• B41J11/002 Primary

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