# US 9,039,160 B2 · Image recording apparatus and irradiator

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- Number: US 9,039,160 B2
- Document ID: US9039160B2
- Status: Granted
- Kind: B2
- Application number: 13/571,689
- Filed: 2012-08-10
- Published: 2013-02-21
- Granted: 2015-05-26
- Earliest claimed: 2011-08-15
- Assignees: Seiko Epson Corporation
- Applicants: Mikito Nakajima
- Inventors: Mikito Nakajima
- Web page: https://patentgrep.com/patent/US9039160B2

## CPC

- B41J 11/0021: {using irradiation}
- B41J 11/0015: {for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing (selective coating B41J2/2114)}
- B41J 2202/09: Ink jet technology used for manufacturing optical filters
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS

## Abstract

An image recording apparatus includes: a nozzle that discharges electromagnetic wave curable ink that is cured when an electromagnetic wave is irradiated onto a recording medium; and an irradiator for irradiating the electromagnetic wave, wherein a filter that transmits the electromagnetic wave is provided on the irradiator, and the filter has a first transmittance that causes the electromagnetic wave curable ink on the recording medium to be curable with respect to an electromagnetic wave that is incident at a first angle and a second transmittance that maintains a state in which the nozzle can discharge the electromagnetic wave curable ink with respect to an electromagnetic wave that is incident at a second angle.

## Claims

### Claim 1

An image recording apparatus comprising:
a nozzle that discharges electromagnetic wave curable ink that is cured when an electromagnetic wave is irradiated onto a recording medium;
an irradiator for irradiating the electromagnetic wave,
wherein a filter that transmits the electromagnetic wave is provided on the irradiator, and
wherein a transmittance by the filter of diagonal light of the electromagnetic wave that is outside of a wavelength range that acts on the curing of the electromagnetic wave curable ink is greater than a transmittance by the filter of diagonal light of the electromagnetic wave that is of a wavelength that acts on the curing of the electromagnetic wave curable ink.

### Claim 2 (depends on 1)

The image recording apparatus according to claim 1,
wherein in a case where the first angle is 0 degrees and the second angle is 45 degrees,
the second transmittance is equal to or less than 50% of the first transmittance.

### Claim 3 (depends on 1)

The image recording apparatus according to claim 1,
wherein in a case where the first angle is 0 degrees and the second angle is 45 degrees,
the second transmittance is equal to or less than 30% of the first transmittance.

### Claim 4 (depends on 1)

The image recording apparatus according to claim 1,
wherein in a case where the first angle is 0 degrees and the second angle is 45 degrees,
the second transmittance is equal to or less than 10% of the first transmittance.

### Claim 5 (depends on 1)

The image recording apparatus according to claim 1,
wherein a wavelength of the electromagnetic wave is equal to or greater than 390 nanometers and less than 410 nanometers.

### Claim 6 (depends on 1)

The image recording apparatus according to claim 1,
wherein the filter is a multilayer filter.

### Claim 7 (depends on 1)

The image recording apparatus according to claim 1,
wherein in the filter, in a case where an angle of the incident electromagnetic wave is 45 degrees, the transmittance of an electromagnetic wave with a wavelength of equal to or greater than 350 nanometers and less than 380 nanometers is greater than the transmittance of an electromagnetic wave with a wavelength of equal to or greater than 390 nanometers and less than 410 nanometers.

### Claim 8 (depends on 1)

The image recording apparatus according to claim 1, wherein the filter has a first transmittance when irradiated with an electromagnetic wave at an angle perpendicular to the plane, and a second transmittance when irradiated with an electromagnetic wave at an angle of 45 degrees to 75 degrees to the plane, and the second transmittance is less than the first transmittance.

### Claim 9

An irradiator comprising:
a light source that can irradiate an electromagnetic wave for curing electromagnetic wave curable ink; and
a filter that transmits the electromagnetic wave,
wherein a transmittance by the filter of diagonal light of the electromagnetic wave that is outside of a wavelength range that acts on the curing of the electromagnetic wave curable ink is greater than a transmittance by the filter of diagonal light of the electromagnetic wave that is of a wavelength that acts on the curing of the electromagnetic wave curable ink.

### Claim 10 (depends on 9)

An image recording apparatus including the irradiator according to claim 9.