Paper machine including a hydraulic cylinder assembly with a non

Details Paper machine including a hydraulic cylinder assembly with a non Paper machine including a hydraulic cylinder assembly with a non

1996-05-14

1998-06-02

Czaja, Donald E.

Paper making and fiber liberation

Apparatus

Running or indefinite length product forming and/or treating...

162357, 492 20, D21F 160

Patent

active

057593540

ABSTRACT:
The invention is directed to a paper machine for making or processing a paper web. The paper machine includes a roll for carrying the paper web; and a hydraulic cylinder assembly connected to the roll for moving the roll. The hydraulic cylinder assembly includes a cylinder defining a chamber, a piston disposed within the cylinder, and a piston rod connected to the piston and extending from the cylinder. The hydraulic cylinder assembly further includes a bushing connected to the cylinder and disposed around the piston rod. The bushing slidably engages the piston rod and substantially seals the cylinder chamber from the ambient environment. The bushing is formed from a non-metallic material having a tensile strength of between approximately 6500 and 12500 psi at a temperature of approximately 73.degree. F., a coefficient of friction of between approximately 0.10 and 0.30, and a maximum continuous operating temperature of approximately 550.degree. F.

REFERENCES:
patent: 5560808 (1996-10-01), Graf

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