US 4,085,970 AGranted

Paperboard chair of unitary construction

AssigneeChippewa Paper Products Company

InventorSheldon D. Klein

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Abstract

A unitary chair of relatively stiff corrugated paperboard formed from a single die-stamped and scored blank, characterized in that it constitutes a base including side panels provided with a pair of opposed slots which are adapted to receive and to lock in interengagement the free ends of both a pivotal seat panel and a pivotal back rest panel. The slots are formed at the junctures of the seat supporting edges of the side panels with the back rest supporting edges of the side panels.

Claims2

Dependent claims

A chair of stiff corrugated paperboard and the like, comprising

a. a single pre-stamped and scored blank defining a unitary structure and comprising
(1) a seat-supporting base including a pair of laterally spaced opposed side panels and a front panel integrally formed with one of said side panels and connected to forwardly directed vertically extending forward edges of said side panels and extending therebetween, said side panels being generally L-shaped and having integrally formed upward extensions at rearward portions thereof, each of said side panels providing a horizontally disposed seat supporting edge and an upwardly projecting back rest supporting edge, each of said side panels being formed with a downwardly extending upwardly opening slot projecting into the side along a line defined by each said back rest supporting edge as a virtual extension thereof, a downwardly directed lower marginal portion of said back rest panel extending into each said slot to engage said side panels,
(2) a back panel integrally joined to each said side panels and bridging between and interconnecting said side panels at rearmost vertically extending extremities thereof,
(3) a seat panel integrally formed with and hingedly connected to a top edge of said front panel along a horizontally extending fold line formed at a juncture of said front panel and said seat panel, said seat panel being pivotal rearwardly at said fold line to abut, bear upon, and to cover said horizontally-disposed seat-supporting edge of each of said side panels,
(4) a back rest panel integrally formed with and hingedly connected to said back panel along a scored hinge line at a juncture of an upper edge of said back panel with said back rest panel, said back rest panel being pivotal forwardly and downwardly about said hinge line generally to overlie said back panel and to abut and cover said back rest supporting edge of each of said upward extensions of said side panels, and
(5) a laterally extending locking flange integrally formed with said seat panel at a rearward terminus thereof and joined to said seat panel along a laterally extending fold line, said locking flange being adapted to project downwardly into and to engage within the slot in each of said side panels and contiguously to abut said lower marginal portion of said back rest panel, thereby to lock said seat panel and said back rest panel firmly in place;
and
b. a seat-supporting vertical wall generally V-shaped in horizontal section and defining a unitary structure separate from said blank, said wall being disposed as an auxiliary strut within said base of said chair beneath said seat panel, said wall having a height equal to the height of said side panels at each seat supporting edge thereof,
whereby, as said seat panel bears upon said seat-supporting edge of each of said side panels, said seat panel also abuts a top edge portion of said wall to constitute an auxiliary weight-bearing support for said seat panel.

6 more elements

Dependencies are inferred from the claim text.

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Abstract

A chair of stiff corrugated paperboard and the like, comprising

a. a single pre-stamped and scored blank defining a unitary structure and comprising
(1) a seat-supporting base including a pair of laterally spaced opposed side panels and a front panel integrally formed with one of said side panels and connected to forwardly directed vertically extending forward edges of said side panels and extending therebetween, said side panels being generally L-shaped and having integrally formed upward extensions at rearward portions thereof, each of said side panels providing a horizontally disposed seat supporting edge and an upwardly projecting back rest supporting edge, each of said side panels being formed with a downwardly extending upwardly opening slot projecting into the side along a line defined by each said back rest supporting edge as a virtual extension thereof, a downwardly directed lower marginal portion of said back rest panel extending into each said slot to engage said side panels,
(2) a back panel integrally joined to each said side panels and bridging between and interconnecting said side panels at rearmost vertically extending extremities thereof,
(3) a seat panel integrally formed with and hingedly connected to a top edge of said front panel along a horizontally extending fold line formed at a juncture of said front panel and said seat panel, said seat panel being pivotal rearwardly at said fold line to abut, bear upon, and to cover said horizontally-disposed seat-supporting edge of each of said side panels,
(4) a back rest panel integrally formed with and hingedly connected to said back panel along a scored hinge line at a juncture of an upper edge of said back panel with said back rest panel, said back rest panel being pivotal forwardly and downwardly about said hinge line generally to overlie said back panel and to abut and cover said back rest supporting edge of each of said upward extensions of said side panels, and
(5) a laterally extending locking flange integrally formed with said seat panel at a rearward terminus thereof and joined to said seat panel along a laterally extending fold line, said locking flange being adapted to project downwardly into and to engage within the slot in each of said side panels and contiguously to abut said lower marginal portion of said back rest panel, thereby to lock said seat panel and said back rest panel firmly in place;
and
b. a seat-supporting vertical wall generally V-shaped in horizontal section and defining a unitary structure separate from said blank, said wall being disposed as an auxiliary strut within said base of said chair beneath said seat panel, said wall having a height equal to the height of said side panels at each seat supporting edge thereof,
whereby, as said seat panel bears upon said seat-supporting edge of each of said side panels, said seat panel also abuts a top edge portion of said wall to constitute an auxiliary weight-bearing support for said seat panel.

6 more elements