Expandable screen tensioning frame with expansion devices
OwnerGene T. Rossoninventor
Life of this patent
Estimating the term…
Abstract
A tensioning apparatus for stretching screen fabric or other membrane comprising an expandable tensioning frame to operatively support the screen fabric or other membrane cooperatively formed by a plurality of frame members and a corresponding plurality of corner members, and at least one expansion or tensioning tool to selectively expand the expandable tensioning frame to stretch the screen fabric or other membrane thereon.
Claims14
A tensioning apparatus for stretching screen fabric comprising an expandable tensioning frame formed by a plurality of cooperative frame members having means for gripping said fabric and a plurality of corner members cooperating with said frame members to operatively support the screen fabric thereon, each frame member includes a first channel having a frictional surface therein, each corner member includes first and second legs, each leg being telescopically disposed within a corresponding first channel of an adjacent end of an adjacent frame member to slidingly engage said frictional surface formed in said corresponding first channel, a plurality of securing means, each securing means secures each leg to said corresponding channel, and each said securing means is movable between a first and second position to selectively engage or disengage said legs to or from said corresponding channels each leg includes a first and second surface, said first surface being held against said corresponding frictional surface by engaging said second surface with said securing means such that engagement between said first surfaces and said corresponding frictional surfaces prevents relative movement between said corner members and said frame members against an inward compression force of the stretched screen fabric when said securing means is in said first position.
A tensioning apparatus for stretching screen fabric comprising an expandable tensioning frame formed by a plurality of cooperative frame members having means for gripping said fabric and a plurality of corner members cooperating with said frame members to operatively support the screen fabric thereon, each frame member includes a first channel having a frictional surface therein, each corner member includes first and second legs, each leg being telescopically disposed within a corresponding first channel of an adjacent end of an adjacent frame member to slidingly engage said frictional surface formed in said corresponding first channel, a plurality of securing means, each securing means secures each leg to said corresponding channel, each said securing means is movable between a first and second position to selectively engage or disengage said legs of said corner members, when in said first position, said securing means secures said legs of said corner members in frictional engagement with said corresponding frictional surfaces of said frame members to prevent movement of said legs relative to said frame members, and an expansion means including at least one expansion device movable between a first and second position to selectively move at least one of said frame members relative to at least one of said adjacent frame members when said securing means is disengaged in said second position as said expansion device is moved between said first and second positions, and each frame member includes an inner and outer wall in spaced relationship to each other and an upper and lower wall and said frictional surface includes a frictional wall extending between said upper and lower walls.
A tensioning apparatus for stretching screen fabric comprising an expandable tensioning frame formed by a plurality of cooperative frame members having means for gripping said fabric and a plurality of corner members cooperating with said frame members to operatively support the screen fabric thereon, each frame member includes a first channel having a frictional surface therein, each corner member includes first and second legs, each leg being telescopically disposed within a corresponding first channel of an adjacent end of an adjacent frame member to slidingly engage said frictional surface formed in said corresponding first channel, a plurality of securing means, each securing means secures each leg to said corresponding channel, and each said securing means is movable between a first and second position to selectively engage or disengage said legs of said corner members, when in said first position, said securing means secures said legs of said corner members in frictional engagement with said corresponding frictional surfaces of said frame members to prevent movement of said legs relative to said frame members, and an expansion means including a support frame having at least one expansion device mounted thereon movable between a first and second position to selectively move at least one of said frame members relative to at least one of said adjacent frame members when said securing means is disengaged in said second position as said expansion device is moved between said first and second positions.
Dependencies are inferred from the claim text.