Four-corner picture frame assembly unit

Claim 2

A picture frame assembly unit comprising an arm mounting means, a plurality of elongated arm means, each arm means having one end pivotally mounted on said arm mounting means, said arm means being disposed in spaced relation with respect to each other about the periphery of said arm mounting means, a runner freely slidably mounted on each of said arm means, and a corner clamping means pivotally mounted on each of said runners for holding the ends of sections of picture frame molding members in abutting relation whereby said molding ends may be permanently secured together by conventional fastening means; each said clamping means including means for engaging the opposite sides of each of two adjacent fraMe members.

Claim 3

A picture frame assembly unit as defined in claim 1, wherein said arm mounting means is affixed to a rotatably supported workbench means.

Claim 4

A picture frame assembly unit as defined in claim 1, wherein said arm means comprises four bars.

Claim 5

A picture frame assembly unit as defined in claim 1, wherein said corner clamp means comprises a pair of flange members extending at right angles to each other and a screw associated foot means positioned to cooperate with each of said flange members.

Claim 6

A picture frame assembly unit as defined in claim 1, wherein said corner clamp means comprises a substantially flat body member, a pair of flange members extending at right angles to said body member and at right angles to each other, and a threaded boss extending from said body member adjacent each of said flange members of said pair of flange members and supporting a screw actuated foot means positioned to cooperate with its associated flange member.

Claim 7

A picture frame assembly unit as in claim 1, wherein said arms are rectangular in transverse cross section and each of said runners is provided with a longitudinally extending rectangular slot for slidably mounting said runners on said arms.

Claim 8

A picture frame assembly unit as in claim 6, wherein the slot in said runners is closed by a removable plate.

Claim 9

A picture frame assembly unit as in claim 1, wherein the pivotal mounting for said corner clamp means includes a pin having a threaded portion secured to said runner and an unthreaded portion extending through an opening formed in said corner clamp means.

Claim 10

A picture frame assembly unit as in claim 1, wherein the support for the rotatable workbench means comprises a table member, an internally threaded sleeve portion, having a head thereon, extending through said arm mounting means, said rotatable workbench and said table member, and a bolt having a head thereon in engagement with said table member and threaded into said sleeve portion.

Claim 11

A picture frame assembly unit as in claim 11, wherein said plurality of elongated arm means consists of four arms, rectangular in transverse cross section; said arm mounting means is affixed to a rotatable workbench; said corner clamp means each comprise a substantially flat body member, a pair of flange members extending at right angles to said body member and at right angles to each other, and a threaded boss extending from said body member adjacent each of said flange members of said pair of flange members and supporting a screw actuated foot means positioned to cooperate with its associated flange member; said runners are each provided with a longitudinally extending rectangular slot for slidably mounting said runners on said arms, the slot being closed by a removable plate; the pivotal mounting of said corner clamp means includes a pin having a threaded portion secured to said runner and an unthreaded portion extending through an opening formed in said corner clamp; and said support for said rotatable workbench comprises a table, an internally threaded sleeve portion having a head thereon extending through said arm mounting plate, said rotatable workbench, and said table, and a bolt having a head thereon and engaged with said table and threaded into said sleeve portion.

Claim 12

A picture frame assembly unit comprising an arm mounting workbench means, a plurality of elongated arm means, each arm means having one end pivotally mounted on said arm mounting workbench means, said arm means being disposed in spaced relation with respect to each other about the periphery of said arm mounting workbench means, a runner freely slidably mounted on each of said arm means, and a corner clamping means pivotally mounted on each of said runners for holding the ends of sections of picture frame molding members in abutting relation whereby said molding ends may be permanently secured together by conventional fastening means; each said clamping means including means for engaging two adjacent frame member ends in a manner tO temporarily prevent relative angular movement of said adjacent ends.

Claim 13

A picture frame assembly unit comprising an arm mounting workbench means, a plurality of elongated arm means, each arm means having one end pivotally mounted on said arm mounting workbench means, said arm means being disposed in spaced relation with respect to each other about the periphery of said arm mounting workbench means, a runner freely slidably mounted on each of said arm means, and a corner clamping means pivotally mounted on each of said runners for holding the ends of sections of picture frame molding members in abutting relation whereby said molding ends may be permanently secured together by conventional fastening means; each said clamping means including means for engaging two adjacent frame member ends in a manner tO temporarily prevent relative angular movement of said adjacent ends.

Claim 14

A picture frame assembly unit as defined in claim 11 wherein means are provided for mounting said workbench for rotation.

Claim 15

A picture frame unit as defined in claim 12 wherein said means provided for the rotation of said workbench includes a table; a sleeve member secured with respect to and extending at right angles to said table; and a stub shaft secured with respect to said workbench and rotatable within said sleeve member.

Claim 16

A picture frame unit as defined in claim 13 wherein said stub shaft extends from a hub member that is secured to said workbench and forms a support for pivotally mounting said elongated arm means.

Claim 17

A picture frame assembly unit as defined in claim 13 wherein said sleeve member is secured within an opening formed centrally of a truncated cone that is secured to the upper surface of said table.

Claim 18

A picture frame assembly unit as defined in claim 15 wherein the central portion of the undersurface of the workbench is flat and is in rotatable contact with the upper surface of the truncated cone whereby any tendency for tilting of the central portion of the workbench is reduced.

Claim 19

A picture frame assembly unit as defined in claim 13 wherein the table is of substantially rectangular shape and is provided with casters in proximity to at least some of the table corners with the rollers of the casters lying in a common plane spaced from the upper surface of said table and in contact with the lower surface of said workbench thereby forming support means for the peripheral portion of the workbench.

Claim 20

A picture frame assembly unit as defined in claim 17 wherein the central portion of the undersurface of the workbench is flat and in rotatable contact with the upper surface of the truncated cone whereby any tendency for the workbench to tilt at its central portion or at its peripheral portion is materially reduced.

Claim 21

A picture frame assembly unit as defined in claim 18 wherein the height of the upper surface of the truncated cone above the upper surface of the table is such that it just equals the distance that a plane which is tangent to all the rollers and passes through the lower surface of the workbench is from the upper surface of the table.

Claim 22

A picture frame assembly unit as defined in claim 19 wherein each of said clamping means includes means for engaging the opposite sides of each of two adjacent frame members.