Patent ID: 8752588
Filing Date: 2014-06-17
Classification: B41J,Y10T

Abstract:
1. A pressure damper comprising: a main body having a concave portion for storing liquid and having conduits opening to the concave portion; a cover mounted to the main body for covering at least the concave portion; a thin film fixedly mounted to the main body at a peripheral section of the concave portion and arranged so as to hermetically seal the concave portion; a reference member disposed in the concave portion and configured to be brought into contact with or separated from the thin film; and displacement amount detecting means for detecting, without contacting the reference member, a displacement of the reference member due to a pressure change of the liquid stored in the concave portion; wherein the displacement amount detecting means comprises a displacement amount sensor fixedly mounted on a surface of the cover on the concave portion side so as to be opposed to the reference member.