Frame member for pressurized screening device
First Claim
1. A frame member for pressurized screening device comprising:
- a frame including a vertical peripheral wall, said peripheral wall defining an opening therein,a screen stretched over said opening to cover the same,an inflatable tube disposed along and outwardly of said peripheral wall, said tube being connected to a pressure source,said frame having a radially extending screen attaching portion disposed outwardly of said tube and means for holding said tube between said screen attaching portion and said peripheral wall, said screen extending over said peripheral wall and said tube to the upper surface of the screen attaching portion,said means for holding said tube comprising a substantially U-shaped channel formed integrally with said frame for receiving said tube therein, said channel being defined by said peripheral wall, a partition wall spaced from and opposed to said peripheral wall and a bottom wall substantially horizontally extending from said peripheral wall to said partition wall at their respective lower extremities,said inflatable tube being of a substantially rectangular cross section having a left side portion, a right side portion, a base portion and a top portion;
said left side portion, said right side portion and said base portion of said rectangular cross section being disposed along said peripheral wall, said partition wall and said bottom wall, respectively and said top portion being concave in its uninflated state and convex in its extremely inflated state,a holder member disposed on said upper surface of the screen attaching portion sandwiching the screen between the upper surface of the screen attaching portion and the lower surface of the holder member, said holder member including an inside peripheral wall surface spaced from and opposed to said partition wall,said inflatable tube being only inflatable in a direction transverse to the direction of the stretching of said screen and in such a manner as to be prevented from contacting said inside peripheral wall surface of said holder member, whereby said tube is brought into contact with said screen and tension can be imparted to said screen by said tube, anda plurality of cap bolts for removably mounting the holder member on the upper surface of said screen attaching portion.
2 Assignments
0 Petitions
Accused Products
Abstract
The frame member for pressurized screening device includes an inflatable tube disposed along and outwardly of the peripheral wall of the frame. A screen is stretched over an opening in the frame and extends above the peripheral wall and the inflatable tube so that the inflatable tube can be brought into contact with the screen to impart tension to the screen. The inflatable tube is only inflatable in a direction transverse to the direction of the stretching of the screen and in such a manner as not to touch the holder member. A holder member is removably mounted on the screen attaching portion of the frame to sandwich the screen between the upper surface of the screen attaching portion and the lower surface of the holder member.
47 Citations
8 Claims
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1. A frame member for pressurized screening device comprising:
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a frame including a vertical peripheral wall, said peripheral wall defining an opening therein, a screen stretched over said opening to cover the same, an inflatable tube disposed along and outwardly of said peripheral wall, said tube being connected to a pressure source, said frame having a radially extending screen attaching portion disposed outwardly of said tube and means for holding said tube between said screen attaching portion and said peripheral wall, said screen extending over said peripheral wall and said tube to the upper surface of the screen attaching portion, said means for holding said tube comprising a substantially U-shaped channel formed integrally with said frame for receiving said tube therein, said channel being defined by said peripheral wall, a partition wall spaced from and opposed to said peripheral wall and a bottom wall substantially horizontally extending from said peripheral wall to said partition wall at their respective lower extremities, said inflatable tube being of a substantially rectangular cross section having a left side portion, a right side portion, a base portion and a top portion;
said left side portion, said right side portion and said base portion of said rectangular cross section being disposed along said peripheral wall, said partition wall and said bottom wall, respectively and said top portion being concave in its uninflated state and convex in its extremely inflated state,a holder member disposed on said upper surface of the screen attaching portion sandwiching the screen between the upper surface of the screen attaching portion and the lower surface of the holder member, said holder member including an inside peripheral wall surface spaced from and opposed to said partition wall, said inflatable tube being only inflatable in a direction transverse to the direction of the stretching of said screen and in such a manner as to be prevented from contacting said inside peripheral wall surface of said holder member, whereby said tube is brought into contact with said screen and tension can be imparted to said screen by said tube, and a plurality of cap bolts for removably mounting the holder member on the upper surface of said screen attaching portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification