5 that transports the medium M, such as fabric, in the transport direction A in a state where the first surface M1 of the medium M faces the adhesive layer 5a, and the head 101 that prints an image on the second surface M2, which is opposite to the first surface M1, with respect to the medium M transported by the transport belt 5. As illustrated in FIG. 1, the printing device 1A of the present embodiment further includes an infrared imaging section 30 that captures an image of an imaging target I provided on the first surface M1 by using infrared rays with respect to the medium M transported by the transport belt 5.

In a configuration in which visible light is used as the detection section that detects the imaging target I, in a case where a fabric is used as the medium M, the detection accuracy of the imaging target I decreases. In particular, when a thick felt or the like is used as the medium M, the detection accuracy of the imaging target I is particularly lowered. On the other hand, since infrared light is more likely to pass through fabric or the like than visible light, it is possible to suitably image the imaging target I by adopting a configuration including the infrared imaging section 30 that captures an image of an imaging target I provided on the first surface M1 using infrared light. By capturing an image of an imaging target I, it is possible to form an image at a suitable position on the second surface M2 with respect to the first surface M1 based on the imaging result. Therefore, the printing device 1A of the present embodiment can print an image at a desired front surface position with respect to the image on the back surface, for example, when performing double-sided printing on a fabric.

Hereinafter, the infrared imaging section 30 will be described in more detail with reference to FIGS. 2 and 3 in addition to FIG. 1. As illustrated in FIG. 2, in the printing device 1A of the present embodiment, the infrared imaging section 30 includes a light emitting section 31 that emits infrared rays and a light receiving section 32 that receives infrared rays, and includes both the light emitting section 31 and the light receiving section 32 on a side facing the second surface M2. In the printing device 1A of the present embodiment, the transport belt 5 is formed of a material that reflects infrared rays.

FIG. 2 shows a state in which the infrared light Le emitted from the light emitting section 31 is absorbed by the imaging target I, and in a place where the imaging target I is not present, the infrared light Le is reflected by the transport belt 5 to become reflected infrared ray Lr, and is received by the light receiving section 32. As described above, in the printing device 1A of the present embodiment, the transport belt 5 is formed of a material that reflects infrared rays, and the infrared imaging section 30 is provided, on the side facing the second surface, with the light emitting section that emits infrared rays and the light receiving section that receives infrared rays. With such a configuration, the light emitting section 31 and the light receiving section 32 can be disposed on the same side with respect to the transport belt 5, so that the device configuration can be simplified.

For suitably capturing an image of the imaging target I, the light emitting section 31 is arranged such that the light emitting elements are aligned in a line along the width direction B or the transport direction A, or in a configuration where the light emitting elements are arranged in a plane along the width direction B and the transport direction A. Accordingly, the light receiving section 32 is preferably configured such that the light receiving elements are arranged in a line along the width direction B or the transport direction A, or the light receiving elements are arranged in a plane along the width direction B and the transport direction A.

The imaging target I can be various objects such as a pattern or unevenness formed on the first surface M1 of the medium M, a printed image printed on the first surface M1 of the medium M, or a seal attached to the first surface M1 of the medium M. There is no particular limitation on the imaging target I, the imaging target I can be anything that absorbs infrared rays more easily than the medium M. In the present embodiment, the imaging target I is a printed image printed in advance by the head 101 of the printing device 1A of the present embodiment. Therefore, it is possible to form double-sided printed matter in which the printed image printed in advance by the head 101 and the image positioned based on the printed image thereafter are suitably aligned. From another viewpoint, the medium M which can be used in the present embodiment can be medium M in which a printed image is formed on the first surface M1 and an image is not printed on the second surface M2.

When double-sided printed matter is formed, it is possible to form the same image on the first surface M1 and the second surface M2 with their positions aligned. However, in addition to such double-sided printed matter, different images may be formed on the first surface M1 and the second surface M2 by aligning the positions of both, or the same or different images may be formed on the first surface M1 and the second surface M2 by differentiating the positions of both by a predetermined amount.

As described above, the printing device 1A of the present embodiment includes the control section 41, and the control section 41 can serve as a correction section that corrects at least one of the image to be printed by the head 101 and the printing position of the image based on the imaging data captured by the infrared imaging section 30. Since printing device 1A of the present embodiment has such a configuration, when double-sided printing is performed on the medium M based on the correction result by the control section 41 as the control section, a new image can be printed automatically and easily at a desired position of the second surface M2 with respect to an image on the back surface (first surface M1).

Correction of the print position of the image corresponds to, for example, correction of the formation position of the image to be printed on the second surface M2 in correspondence with the print image on the first surface M1 in a case such as when the same image is formed on the first surface M1 and the second surface M2 by aligning the positions of both surfaces. Image correction includes, for example, in a case such as when the same image is to be formed on the first surface M1 and the second surface M2 in alignment with each other and the medium M is attached to the adhesive layer 5a in an expanded or contracted state, by correcting the image data and the like according to the expanded or contracted state, the image data and the like is corrected to make the images on the first surface M1 and on the second surface M2 identical and aligned when the medium M is removed from the adhesive layer 5a and the expanded or contracted state is released.

As shown in FIG. 1, the printing device 1A of the present embodiment includes a pressing section