Title:
【発明の名称】製紙用原料圧力脈動吸収装置
Document Type and Number:
Japanese Patent JP3377721
Kind Code:
B2
Abstract:
Disclosed is a stock liquor pressure pulsation absorbing apparatus of active type which is able to absorb pressure pulsation in the ordinarily demanded frequency range of 0.01 to 100 Hz. The apparatus comprises a by-pass pipe (2) for extracting a portion of a stock liquor from a master pipe (1) for supplying the stock liquor to a paper machine headbox; a control pump (7) for returning a portion of the stock liquor so extracted into said by-pass pipe; and a means (3) for detecting a stock liquor pulsation pressure at a branch point or on an upstream side thereof of said by-pass pipe and master pipe for controlling said control pump, thereby the pressure pulsation, including the low frequency range, of the stock liquor is absorbed accurately and precisely, variation in the basis weight is made small and a stable supply of final products with high quality can be attained.
Inventors:
Hideki Hirooka
Toshimi Tajima
Tetsuo Makino
Mamoru Tanaka
Toshimi Tajima
Tetsuo Makino
Mamoru Tanaka
Application Number:
JP17409597A
Publication Date:
February 17, 2003
Filing Date:
June 30, 1997
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
D21F1/06; (IPC1-7): D21F1/06
Domestic Patent References:
| JP5747994A |
Other References:
【文献】米国特許4030971(US,A)
Attorney, Agent or Firm:
Arata Ishikawa (1 person outside)