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    • 22. 发明专利
    • APPARATUS FOR MAKING SINGLE FACED CORRUGATED BOARD
    • AU522144B2
    • 1982-05-20
    • AU6131780
    • 1980-08-11
    • MITSUBISHI HEAVY IND LTD
    • HIRAKAWA TADASHIKATAYAMA KEIICHISASASHIGE HIROAKITAKENAKA HIROYUKI
    • B32B3/28B29C63/00B31F1/28B32B37/00
    • The invention relates to a single facer for corrugated board of the kind comprising upper and lower corrugating rolls 1, 2 having meshing flutes, and a pressure member 3 disposed close to said lower roll 2 to provide an opposed surface in conformity with the rotational surface of said lower roll 2, said pressure surface having a length, in the circumferential direction of the lower roll 2, greater than the distance " l " between two adjacent flutes of said roll. … An object of the invention is to reduce the friction between the pressure surface of the pressure member and a liner web 5 fed thereacross. … The invention is characterised by means 13 for forming a gaseous layer between the pressure surface 12a of the pressure member 10a and the liner web 5 fed between the lower corrugating roll and said pressure member, whereby to reduce friction forces on said liner web during pressing together and pasting of said web and a corrugated web 6 carried on the lower roll 2. … Preferably, the means comprise a plurality of bores 13 extending through the pressure surface which communicate with a source of air or gas; each bore may be normally closed by a spring biased valve 15 which projects above said pressure surface, said valve being opened by pressing action between said liner and corrugated webs as they pass thereacross.
    • 27. 发明专利
    • SEARCHING DEVICE FOR ABNORMAL SOUND GENERATING PART
    • JPH01114725A
    • 1989-05-08
    • JP27252387
    • 1987-10-28
    • MITSUBISHI HEAVY IND LTD
    • KATAYAMA KEIICHIMORII SHIGEKINAGAI NAOYUKITSUBOI MAMORU
    • G01M99/00G01H17/00
    • PURPOSE:To improve the accuracy by bringing acceleration signals of an abnormal sound which has been measured in plural parts, to Fourier-transformation and executing a frequency analysis, dividing frequency analysis signals in two arbitrary parts and deriving an arrival time difference of the abnormal sound from the phase gradient. CONSTITUTION:For instance, to a piping duct 1, accelerometers 5, 6 and 7 are attached by assuming an abnormal sound generating part 4, and detecting signals are inputted to an A/D converter 9 with sample holding, respectively. Subsequently, in accordance with whether a sound velocity of a propagation wave motion is derived, or the abnormal sound generating part is searched, said signals pass through a window device 10 for eliminating a reflected wave of a digital signal, through a controller 8 for controlling the whole device, and led to a frequency analyzing circuit 11 for executing the Fourier-transformation. Next, with respect to two arbitrary signals which have been derived by the circuit 11, the phase is derived, respectively, and also, a division 12 is executed, and in a time difference detecting circuit 13, a gradient is derived with respect to a dividing signal of the phase derived by the division 12, and a time difference of two signals is derived. Accordingly, the sound velocity calibration and the abnormal sound generating part search can be executed simultaneously with high accuracy.