| 摘要 |
A cross lapper for making a multilayer fibrous mat and including a frame, first and second endless driven conveyors respectively carried by reciprocating supports which are moved between extreme positions on the frame by a fluid ram having its cylinder connected to the frame and its piston rod connected to one of the supports. A fixed rack is carried by the frame and a second rack is carried by one of the supports with a pinion engaging the respective racks and has its axis aligned with the axis of a fluid ram. The means for supplying pressure fluid to opposite ends of the cylinder is in the form of a fluid circuit having a fluid-actuated control device interposed between a pressure fluid source and the cylinder with first and second flow paths between the source and opposite ends of the control device, each of the flow paths having a control valve therein. The control valves are positioned to define extreme positions for the supports and are actuated when the supports reach the extreme positions to reverse the position of the control device.
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