Rectangular parallelepipedic case and method of producing the same
AssigneeFuji Photo Film Co., Ltd.
InventorsHirofumi Abe, Akihisa Inoue, Shinichi Takahashi
Life of this patent
Estimating the term…
Abstract
A rectangular parallelepipedic case includes four or more walls formed by bending a single plate. To produce the case, a double plate is used. The double plate is formed from plastic by extrusion, and first and second plate elements confronted with each other. Partition portions interconnect the first and second plate elements, and extend in the direction of the extrusion, to define plural hollow chambers between the first and second plate elements. The double plate is bent along bend lines substantially at a right angle. At least one of the bend lines is at least partially curved.
Claims23
A case producing method of producing a substantially rectangular parallelepipedic case, said case having plural walls formed by bending a single plate, said case producing method comprising the steps of:
- providing a double plate, said double plate being formed from plastic by extrusion, said double plate including first and second plate elements confronted with each other, and partition portions for interconnecting said first and second plate elements, said plural partition portions extending in an extruding direction, to define plural hollow chambers between said first and second plate elements;
- and
- bending said double plate along plural bend lines substantially at a right angle, at least one of said bend lines being at least partially curved,
- wherein said at least one curved bend line causes at least one of said walls to curve inward with respect to said case, and
- wherein said at least one curved bend line is located between two adjacent ones of said partition portions.
A substantially rectangular parallelepipedic case, having plural walls, said case comprising:
- a double plate formed from plastic by extrusion, said double plate including first and second plate elements confronted with each other, and partition portions for interconnecting said first and second plate elements, said plural partition portions extending in an extruding direction, to define plural hollow chambers between said first and second plate elements;
- and
- plural bend lines formed on said first plate element such that said second plate element remains free from bend lines, said double plate being bent along said plural bend lines substantially at a right angle to define said walls, at least one of said bend lines being at least partially curved;
- and
- a hinge line, parallel to one of said bend lines, for folding one of said walls into two, said hinge line being formed by cutting an inner one of said first and second plate elements in a substantially straight manner.
A substantially rectangular parallelepipedic case, having plural walls, said case comprising:
- a double plate formed from plastic by extrusion, said double plate including first and second plate elements confronted with each other, and partition portions for interconnecting said first and second Plate elements, said plural partition portions extending in an extruding direction, to define plural hollow chambers between said first and second plate elements;
- and
- plural bend lines formed on said double plate, said double plate being bent along said plural bend lines substantially at a right angle to define said walls, at least one of said bend lines being at least partially curved,
- wherein said at least one curved bend line causes at least one of said walls to curve inward with respect to said case, and said at least one curved bend line is located between two adjacent ones of said partition portions.
A substantially rectangular parallelepipedic case, having plural walls, said case comprising:
- a double plate formed from plastic by extrusion, said double plate including first and second plate elements confronted with each other, and partition portions for interconnecting said first and second plate elements, said plural partition portions extending in an extruding direction, to define plural hollow chambers between said first and second plate elements;
- and
- plural bend lines formed on said double plate, said double plate being bent along said plural bend lines substantially at a right angle to define said walls, at least one of said bend lines being at least partially curved;
- said case containing a recording material roll, said recording material roll including a core and recording material wound about said core;
- first to third ones of said bend lines being formed by a heat presser;
- a first one of said walls being confronted with a third one of said walls, and a second one of said walls being confronted with a fourth one of said walls to define a shape of a quadrangular tube of which two ends are open, said first bend line being located between said first and second walls, said second bend line being located between said second and third walls, said third bend line being located between said third and fourth walls;
- a slit-shaped outlet, defined between said first and fourth walls, said recording material being drawn through said slit-shaped outlet;
- first and second caps, secured to respective ends of said quadrangular tubular shape, for supporting said recording material roll in a rotatable manner;
- and
- further comprising a hinge line, parallel with said first bend line, for folding said second wall into two, said hinge line being formed by cutting an inner one of said first and second plate elements in a substantially straight manner.
Dependencies are inferred from the claim text.