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Printer

Imported: 24 Feb '17 | Published: 06 Jan '04

Toshihiro Kitahara, Hiroshi Hashi

USPTO - Utility Patents

Abstract

A printer comprises a transportation belt, a printer head, and a pneumatic paper sucker. The transportation belt is driven by a driving roller that drives a driven roller. The printer head includes a plurality of head units each having ink-jet surfaces. In the printer, print paper is adsorbed to the transportation belt by the sucker, and transported in a direction of transportation. Ink drops jetted out from the head units are shot at correct points on the print paper specified in print data. Thus, printing is achieved. According to the printer, the printer head need not be shifted in the process of printing, but printing can be achieved at a high speed. Moreover, the costs of manufacturing can be reduced, and the printer can be designed compactly.

Description

The other features of the present invention and the advantages thereof will be apparent from the description below.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a system configuration of a printer in accordance with a first embodiment of the present invention;

FIG. 2 is a longitudinal sectional view schematically showing a printing mechanism and its surroundings included in the printer shown in FIG. 1;

FIG. 3 is a perspective view showing the structure of a paper transportation system adapted to the printer shown in FIG. 1;

FIG. 4 is a perspective view showing the arrangement of members of a printer head adapted to the printer shown in FIG. 1;

FIG. 5 is an enlarged view showing the arrangement of nozzles that are included in head units which constitute the printer head shown in FIG.

4 and that are seen from the side of ink-jet surfaces;

FIG. 6 is an enlarged view showing nozzles which are included in one of the head units that constitute the printer head shown in FIG. 4, of which positions have been adjusted, which are seen from the side of ink-jet surfaces;

FIG. 7A is an enlarged view showing dots printed by the head unit shown in FIG. 6, in which the positions of the nozzles are unadjusted;

FIG. 7B is an enlarged view showing dots printed by the head unit shown in FIG. 6, in which the positions of the nozzles have been adjusted;

FIG. 8 is a perspective view showing a black head block that is employed in a variant of the printer head (head block) adapted to the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 9 is a perspective view showing a variant, which includes a paper sucker, of a paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 10 is a longitudinal sectional view showing another variant, which includes a paper sucker, of the paper transportation system employed in of the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 11 is a longitudinal sectional view showing part of another variant, which includes a paper sucker, of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 12 is a partial perspective sectional view showing part of another variant, which includes a paper sucker, of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 13 is a perspective view showing another variant, which includes a paper sucker, of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 14 is a longitudinal sectional view showing part of the paper transportation system of the variant that is shown in FIG.

13 and that holds paper;

FIG. 15 is a longitudinal sectional view showing part of another variant, which includes a paper sucker, of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 16 is a side view showing another variant of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 17 is a longitudinal sectional view showing part of another variant of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 18A is a perspective view showing the projections of a transportation belt included in another variant of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 18B is a longitudinal sectional view showing part of the projections of the transportation belt included in the paper transportation system of the variant shown in FIG. 18A;

FIG. 19 is a perspective view showing another variant of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 20 is a perspective view showing another variant of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 21 is a sectional view showing part of a platen included in the paper transportation system of the variant shown in FIG. 20;

FIG. 22 is a side view showing another variant of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 23A is a longitudinal sectional view showing part of another variant of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 23B is a longitudinal sectional view showing part of another variant of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 24 is a perspective view showing another variant of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 25 is a plan view showing another variant of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 26 is a plan view showing another variant of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 27 is a G—G sectional view of the paper transportation system shown in FIG. 26;

FIG. 28 is a side view showing another variant of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 29 is a side view showing another variant of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 30 is a perspective view showing another variant of the paper transportation system employed in the printer in accordance with the first embodiment shown in FIG. 1;

FIG. 31 is a perspective view showing a major portion of a printer in accordance with a second embodiment of the present invention;

FIG. 32 is a perspective view showing a major portion of a printer in accordance with a third embodiment of the present invention;

FIG. 33 is a longitudinal sectional view showing a printer head and its surroundings included in the printer in accordance with the third embodiment;

FIG. 34 is a perspective view showing a printer in accordance with a variant of the third embodiment of which speed/position and origin sensors are different from those of the printer in accordance with the third embodiment;

FIG. 35 is a perspective view showing a major portion of a printer in accordance with a fourth embodiment of the present invention;

FIG. 36 is an H—H sectional view of the major portion shown in FIG. 35;

FIG. 37 is a J—J sectional view of the major portion shown in FIG. 35;

FIG. 38 is a perspective view showing the structure of a major portion of a printer in accordance with a fifth embodiment of the present invention;

FIG. 39 is a side view showing the structure of a major portion of a printer in accordance with a sixth embodiment of the present invention;

FIG. 40 is a side view showing the structure of a major portion of a printer in accordance with a seventh embodiment of the present invention;

FIG. 41 is a side view showing the structure of a major portion of a printer in accordance with an eighth embodiment of the present invention;

FIG. 42 is a side view showing the structure of a major portion of a printer in accordance with a ninth embodiment of the present invention;

FIG. 43 is a side view showing the structure of a major portion of a printer in accordance with a tenth embodiment of the present invention;

FIG. 44 is a side view showing the structure of a major portion of a printer in accordance with an eleventh embodiment of the present invention;

FIG. 45 is a side view showing the structure of a major portion of a printer in accordance with a twelfth embodiment of the present invention;

FIG. 46 is a side view showing the structure of a major portion of a printer in accordance with a thirteenth embodiment of the present invention;

FIG. 47 is a side view showing the structure of a major portion of a printer in accordance with a fourteenth embodiment of the present invention;

FIG. 48 is a side view showing the structure of a major portion of a printer in accordance with a fifteenth embodiment of the present invention;

FIG. 49 is a side view showing the structure of a major portion of a printer in accordance with a sixteenth embodiment of the present invention;

FIG. 50 is a side view showing the structure of a major portion of a printer in accordance with a seventeenth embodiment of the present invention;

FIG. 51 is a side view showing the structure of a major portion of a printer in accordance with an eighteenth embodiment of the present invention; and

FIG. 52 is a side view showing the structure of a major portion of a printer in accordance with a nineteenth embodiment of the present invention.

Claims

1. A printer comprising:

2. A printer comprising:

3. A printer comprising:

4. The printer according to claim 3, wherein said printing control means infers a difference in thickness of said transportation belt from the variation of the ink-jet distance.

5. The printer according to claim 4, wherein said printing control means stores values of differences in the thickness of said transportation belt measured at points all over said transportation belt as the difference in the thickness of said transportation belt, and controls the timing of jetting out ink according to the measured values.

6. The printer according to claim 3, further comprising an ink-jet distance detecting means for measuring a distance to a surface of the print paper or of said transportation belt near the ink-jet surface included in said printer head, wherein said printing control means controls the timing of jetting out ink according to a point at which the distance to the surface of the print paper is measured by said ink-jet distance detecting means.

7. A printer comprising:

8. The printer according to claim 7, wherein said transportation belt is adapted not to hold the print paper in said recovery area.

9. The printer according to claim 7, wherein said recovery area is an ink-jet area which is defined on said transportation belt and through which ink drops are jetted out from said nozzles in order to enable said nozzles to recover the ability to jet out ink.

10. The printer according to claim 9, further comprising a recovering device placed inside said transportation belt opposed to said printer head, and wherein: