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Printing apparatus

  • US 9,682,545 B2
  • Filed: 12/19/2014
  • Issued: 06/20/2017
  • Est. Priority Date: 12/25/2013
  • Status: Active Grant
First Claim
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1. A printing apparatus comprising:

  • a plurality of plate cylinders for printing different colors arranged in a circumferential direction at predetermined intervals in a state where the centers of the plate cylinders are located on the circumference of a circle whose center is located at the center of a blanket cylinder;

    a plurality of ink supply units which respectively supply ink to the plate cylinders;

    a machine frame which supports the plurality of plate cylinders and the plurality of ink supply units; and

    an ink supply unit moving device that moves the ink supply unit between an operation position and a standby position, the ink supply unit being in contact with a respective plate cylinder when at the operation position, and the ink supply unit being out of contact with the respective plate cylinder when at the standby position,wherein the ink supply unit is a unitized member having a casing accommodating components therein,wherein the ink supply unit corresponding to the plate cylinder is disposed on a radially outer side of the plate cylinder,wherein the ink supplying unit moving device moves the casing of the ink supply unit to move the ink supply unit between the operation position in which ink can be supplied to the plate cylinder and the standby position located further to an outer side in a radial direction of the blanket cylinder than the operation position,wherein, when the ink supply unit is located at the standby position, a first gap is provided between the ink supply unit and the respective plate cylinder and a second gap is provided between the ink supply unit and adjacent ink supply units so that maintenance can be performed on the ink supply unit or the respective plate cylinder,wherein, when the ink supply unit is located at the operation position, a significantly smaller gap than the second gap is provided between the ink supply unit and the adjacent ink supply units,wherein an opening is provided in the casing to open to the circumferential side, and an intermediate sealing member is provided between the adjacent ink supply units in the operation positions,wherein the intermediate sealing member is constituted of a front closing plate, a rear closing plate, a radially outer-side closing plate, and a radially inner-side closing plate, and the intermediate sealing member has a shape opened to both circumferential sides, andwherein a first opening of the intermediate sealing member communicates with the opening of the casing of a first adjacent ink supply unit in the operation position and a second opening of the intermediate sealing member communicates with the opening of the casing of a second adjacent ink supply unit in the operation position.

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