Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
222 words
Web guide apparatus wherein a guide roll in surface contact with a traveling web is shifted in response to the movement of a movable feeling device in contact with the lateral edge of the web, comprising the combination of a frame, a carriage movably mounted on the frame and carrying one end of the guide roll, a cylinder mounted on the carriage and movable therewith, a piston rod fixedly associated with said frame and extending through both ends of the cylinder, a double headed piston secured to said rod, slidably engaged in said cylinder and defining first and second chambers therewith, an area of reduced diameter around said piston between the ends thereof defining a third chamber between said piston and cylinder, means for supplying said third chamber with hydraulic fluid under pressure, barrier means for resisting flow of hydraulic fluid in said third chamber upon movement of said cylinder relative to said piston, valve means connected to said first and second chambers and having an inlet and an exhaust outlet, means for supplying said inlet with high fluid pressure, said valve means being operab le to supply fluid pressure to one of said first and second chambers while exhausting fluid pressure from the other of said chambers, and means connecting said movable feeling device to said valve means for operation thereof.
Claim 2
Dependent Claim
222 words
Web guide apparatus wherein a guide roll in surface contact with a traveling web is shifted in response to the movement of a movable feeling device in contact with the lateral edge of the web, comprising the combination of a frame, a carriage movably mounted on the frame and carrying one end of the guide roll, a cylinder mounted on the carriage and movable therewith, a piston rod fixedly associated with said frame and extending through both ends of the cylinder, a double headed piston secured to said rod, slidably engaged in said cylinder and defining first and second chambers therewith, an area of reduced diameter around said piston between the ends thereof defining a third chamber between said piston and cylinder, means for supplying said third chamber with hydraulic fluid under pressure, barrier means for resisting flow of hydraulic fluid in said third chamber upon movement of said cylinder relative to said piston, valve means connected to said first and second chambers and having an inlet and an exhaust outlet, means for supplying said inlet with high fluid pressure, said valve means being operab le to supply fluid pressure to one of said first and second chambers while exhausting fluid pressure from the other of said chambers, and means connecting said movable feeling device to said valve means for operation thereof.
Claim 3
Dependent Claim
42 words
The apparatus of claim 1 wherein check valve means are provided on the inlet of said valve means for allowing flow of pressure fluid only into said valve means, whereby said cylinder is not moved by a sudden decrease in pressure fluid.
Claim 4
Dependent Claim
27 words
The apparatus of claim 2 wherein the means for supplying said third chamber with hydraulic fluid includes check valve means allowing flow only toward said third chamber.
Claim 5
Dependent Claim
57 words
The apparatus of claim 2 wherein the area of reduced diameter around said piston is in the shape of a torus, and said barrier means comprises a ring member extending from said cylinder and sealably and slidably engaging the reduced diameter portion of said piston and dividing said chamber, said ring member having a restricted orifice therethrough.