Painting fastener

Claim 2

A fastener for detachably securing a canvas-stretcher to a frame; said canvas-stretcher having a rear external peripheral edge conforming substantially both in size and configuration to a surrounding rear internal peripheral edge of said frame; said fastener comprising bracket means for embracing a portion of said internal peripheral edge of said frame, and a cantilevered flexible tongue fixedly secured to said bracket means and adapted to extend across and overlie said external peripheral edge of said canvas-stretcher; said bracket means having both a sufficiently greater lateral rigidity and lateral extent than said tongue to stabilize itself, and thereby said tongue, against bending relative to said frame in a plane parallel to one encompassing said external peripheral edge of said canvasstretcher; said tongue being sufficiently flexible such that it is bendable, normally of said plane, from a first position overlying said canvas-stretcher to a second position extending generally parallel to, and between, said internal and external peripheral edges of said frame and canvas-stretcher, respectively; said tongue when bent into said second position permitting removal of said canvas-stretcher from said frame; said bracket means being generally L-shaped in cross-section and presenting a pair of mutually perpendicular limbs; one of said limbs being adapted to overlie a portion of said frame adjacent to said internal peripheral edge of the latter; the other of said limbs being adapted to be interpositioned between said internal and external peripheral edges of said frame and canvas-stretcher, respectively; said other of said limbs having a medially disposed cut-out which terminates at said tongue and divides the latter said limb into a pair of legs spaced from one another over a distance corresponding to the lateral extent of said tongue which is most proximate thereto.

Claim 3

A fastener as claimed in claim 1 wherein each of said limbs of said bracket means is provided with a plurality of apertures to permit stabilized anchoring thereof to said frame.

Claim 4

A fastener as claimed in claim 1 wherein said tongue and bracket means are integral with one another and derived as a unit from a thin common metal sheet; said limbs being bendable relative to one another normally of the lateral extent thereof to permit tight-fit embracing of said frame by said bracket means.

Claim 5

A fastener as claimed in claim 1 including a resilient pad secured to an undersurface of said tongue and engageable with said convas-stretcher.

Claim 6

A fastener as claimed in claim 1 wherein said tongue is provided with at least one aperture to permit anchoring thereof to said canvas-stretcher.

Claim 7

A fastener as claimed in claim 1 wherein said tongue and bracket means are metallic and welded to one another; said bracket means having a greater thickness and rigidity than said tongue.

Claim 8

In combination, a canvas-stretcher, and a frame into which said canvas-stretcher is insertable, said canvas-stretcher having a rear external peripheral edge conforming substantially both in size and configuration to a surrounding rear internal peripheral edge of said frame; the improvement comprising a fastener for detachably securing said canvas-stretcher to said frame; said fastener including bracket means for embracing a portion of said internal peripheral edge of said frame, and a cantilevered flexible tongue fixedly secured to said bracket means and adapted to extend across and overlie said external peripheral edge of said canvas-stretcher; said bracket means having both a sufficiently greater lateral rigidity and lateral extent than said tongue to stabilize itself, and thereby said tongue, against bending relative to said frame in a plane parallel to one encompassing said external peripheral edge of said canvas-stretcher; said tongue being sufficiently flexible such that it is bendable, normally of said plane, from a first position overlying said canvas-stretcher to a second position extending generally parallel to, and between, said internal and external peripheral edges of said frame and canvas-stretcher, respectively; said tongue when bent into said second position permitting removal of said canvas-stretcher from said frame; said tongue and bracket means being integral with one another and derived as a unit from a common metal sheet; said bracket means being generally L-shaped in crosssection and defined by a pair of mutually perpendicular limbs; one of said limbs being adapted to overlie and be affixed to said frame; the other of said limbs being interpositionable between said internal and external peripheral edges of said frame and canvas-stretcher, respectively; said other of said limbs being provided with a medially disposed cut-out which terminates at said tongue and divides the latter said limb into a pair of legs spaced from one another over a distance corresponding to the lateral extent of said tongue which is most proximate thereto.

Claim 9

In combination, a canvas-stretcher, and a frame into which said canvas-stretcher is insertable, said canvas-stretcher having a rear external peripheral edge conforming substantially both in size and configuration to a surrounding rear internal peripheral edge of said frame; the improvement comprising a fastener for detachably securing said canvas-stretcher to said frame; said fastener including bracket means for embracing a portion of said internal peripheral edge of said frame, and a cantilevered flexible tongue fixedly secured to said bracket means and adapted to extend across and overlie said external peripheral edge of said canvas-stretcher; said bracket means having both a sufficiently greater lateral rigidity and lateral extent than said tongue to stabilize itself, and thereby said tongue, against bending relative to said frame in a plane parallel to one encompassing said external peripheral edge of said canvas-stretcher; said tongue being sufficiently flexible such that it is bendable, normally of said plane, from a first position overlying said canvas-stretcher to a second position extending generally parallel to, and between, said internal and external peripheral edges of said frame and canvas-stretcher, respectively; said tongue when bent into said second position permitting removal of said canvas-stretcher from said frame; said tongue and bracket means being integral with one another and derived as a unit from a common metal sheet; said bracket means being generally L-shaped in crosssection and defined by a pair of mutually perpendicular limbs; one of said limbs being adapted to overlie and be affixed to said frame; the other of said limbs being interpositionable between said internal and external peripheral edges of said frame and canvas-stretcher, respectively; said other of said limbs being provided with a medially disposed cut-out which terminates at said tongue and divides the latter said limb into a pair of legs spaced from one another over a distance corresponding to the lateral extent of said tongue which is most proximate thereto.