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US 7,832,332 B2Granted
Printing device and ultraviolet irradiation apparatus
AssigneeTohoku Ricoh Co., Ltd.
InventorMitsuo Sato
Life of this patent
Estimating the term…
Abstract
A printing device comprising a stencil printing device which is excellent in operativity, in which a print drum with UV ink and non-UV ink can be used in a single stencil printing device. The printing device has a stencil printing control device and UV irradiation control device in which a drum unit ink type identifying sensor, which detects whether the print drum attached to the stencil printing device main body is a print drum unit for UV ink or a drum unit for non-UV ink, is used to operate at least a UV lamp, of the UV lamp and a UV auxiliary lamp, and to irradiate UV light when attachment of the drum unit for UV ink is detected, or to stop the operation of the UV lamp and UV auxiliary lamp when attachment of the print drum unit for non-UV ink is detected.
Claims22
A printing device, comprising:
- ultraviolet irradiation means for irradiating a printed paper with ultraviolet radiation;
- attaching/detaching means for selectively attaching and detaching to and from a printing device main body a print drum for ultraviolet curable ink, installed with an ultraviolet curable ink, and a print drum for non-ultraviolet curable ink, installed with a non-ultraviolet curable ink;
- print drum detection means for detecting whether the print drum attached to the printing device main body via the attaching/detaching means is either the print drum for ultraviolet curable ink or the print drum for non-ultraviolet curable ink;
- first control means for operating the ultraviolet irradiation means when attachment of the print drum for ultraviolet curable ink is detected by the print drum detection means, and stopping the operation of the ultraviolet irradiation means when attachment of the print drum for non-ultraviolet curable ink is detected by the print drum detection means;
- paper conveying means for conveying a printed paper to be irradiated with the ultraviolet radiation, a paper conveying speed of the paper conveying means increasing as a printing speed increases, and the paper conveying speed of the paper conveying means decreasing as a paper size in a paper conveyance direction decreases;
- paper conveyance driving means for driving the paper conveying means;
- and
- second control means for controlling the paper conveyance driving means so as to make a change to conveying speed of the paper conveying means in response to printing speed information and paper conveyance direction size information only when attachment of the print drum for ultraviolet curable ink is detected by the print drum detection means such that a distance between consecutive printed papers is changed by the second control means from a first distance before the paper conveyance driving means to a second distance after the paper conveyance driving means.
5 more elements
An ultraviolet irradiation apparatus capable of being connected to a printing device, the ultraviolet irradiation apparatus comprising:
- ultraviolet irradiation means for irradiating a printed paper with ultraviolet radiation;
- paper conveying means for conveying the printed paper to be irradiated with the ultraviolet radiation, a paper conveying speed of the paper conveying means increasing as a printing speed increases, and the paper conveying speed of the paper conveying means decreasing as a paper size in a paper conveyance direction decreases;
- control means for operating the ultraviolet irradiation means on the basis of a signal transmitted from the printing device indicating that a print drum for ultraviolet curable ink installed with an ultraviolet curable ink has been attached, and for stopping the operation of the ultraviolet irradiation means on the basis of a signal transmitted from the printing device indicating that a print drum for non-ultraviolet curable ink installed with a non-ultraviolet curable ink has been attached;
- paper conveyance driving means for driving the paper conveying device;
- and
- second control means for controlling the paper conveyance driving device so as to make a change to conveying speed of the paper conveying device in response to printing speed information and paper conveyance direction size information only when attachment of the print drum for ultraviolet curable ink is indicated by the control means such that a distance between consecutive printed papers is changed by the second control means from a first distance before the paper conveyance driving means to a second distance after the paper conveyance driving means.
3 more elements
A printing device, comprising:
- an ultraviolet irradiation device configured to irradiate a printed paper with ultraviolet radiation;
- an attaching/detaching device configured to selectively attach and detach to and from a printing device main body a print drum for ultraviolet curable ink, installed with an ultraviolet curable ink, and a print drum for non-ultraviolet curable ink, installed with a non-ultraviolet curable ink;
- a print drum detection device configured to detect whether the print drum attached to the printing device main body via the attaching/detaching device is either the print drum for ultraviolet curable ink or the print drum for non-ultraviolet curable ink;
- a first control device configured to operate the ultraviolet irradiation device when attachment of the print drum for ultraviolet curable ink is detected by the print drum detection device, and stopping the operation of the ultraviolet irradiation device when attachment of the print drum for non-ultraviolet curable ink is detected by the print drum detection device;
- a paper conveying device configured to convey a printed paper to be irradiated with the ultraviolet radiation, a paper conveying speed of the paper conveying device increasing as a printing speed increases, and the paper conveying speed of the paper conveying device decreasing as a paper size in a paper conveyance direction decreases;
- a paper conveyance driving device configured to drive the paper conveying device;
- and
- a second control device configured to control the paper conveyance driving device so as to make a change to conveying speed of the paper conveying device in response to printing speed information and paper conveyance direction size information only when attachment of the print drum for ultraviolet curable ink is detected by the print drum detection device such that a distance between consecutive printed papers is changed by the second control device from a first distance before the paper conveyance driving device to a second distance after the paper conveyance driving device.
5 more elements
An ultraviolet irradiation apparatus capable of being connected to a printing device, the ultraviolet irradiation apparatus comprising:
- an ultraviolet irradiation device configured to irradiate a printed paper with ultraviolet radiation;
- a paper conveying device configured to convey the printed paper to be irradiated with the ultraviolet radiation, a paper conveying speed of the paper conveying device increasing as a printing speed increases, and the paper conveying speed of the paper conveying device decreasing as a paper size in a paper conveyance direction decreases;
- a control device configured to operate the ultraviolet irradiation device on the basis of a signal transmitted from the printing device indicating that a print drum for ultraviolet curable ink installed with an ultraviolet curable ink has been attached, and for stopping the operation of the ultraviolet irradiation device on the basis of a signal transmitted from the printing device indicating that a print drum for non-ultraviolet curable ink installed with a non-ultraviolet curable ink has been attached;
- a paper conveyance driving device for driving the paper conveying device;
- and
- a second control device configured to control the paper conveyance driving device so as to make a change to conveying speed of the paper conveying device in response to printing speed information and paper conveyance direction size information only when attachment of the print drum for ultraviolet curable ink is indicated by the control device such that a distance between consecutive printed papers is changed by the second control device from a first distance before the paper conveyance driving device to a second distance after the paper conveyance driving device.
3 more elements
Dependencies are inferred from the claim text.