Collapsible corrugated plastic box
AssigneeTechnology Container Corporation
InventorFred Dowd
Life of this patent
Estimating the term…
Abstract
This invention provides a collapsible box made of corrugated plastic, which has improved hinge line/score line configurations between walls and panels and improved hand holds. A plastic box of this invention preferably has an automatically lockable bottom to facilitate erection of the box, and can be easily collapsed for return shipment and reuse.
Claims36
A collapsible box made of corrugated plastic comprising at least four vertical side walls and a bottom end flap integrally connected to each of said side walls through a hinge line, wherein each hinge line between the respective side wall and its respective bottom end flap is vertically offset from the adjacent hinge lines, and each of said hinge lines between each said side wall and its respective end flap comprises a crushed score line and a perforated score line substantially parallel to said crushed score line.
A collapsible box made of corrugated plastic that includes interconnected facing sheets on the inside and outside faces of said box, said box comprising:
- two vertical width walls;
- two vertical length walls;
- a bottom width flap attached to each said width wall through a hinge line;
- a bottom length flap attached to each said length wall through a hinge line;
- one of said bottom length flaps hingedly connected to one of said width flaps along a diagonal hinge line and the other said bottom length flap hingedly connected to the other said width flap along a diagonal hinge line to form an automatic lock bottom to said box;
- and
- said hinge lines between each of said width walls and their respective bottom width flaps and between each of said length walls and their respective bottom length flaps comprising a crushed score line and a perforated score line which is substantially parallel to and higher than said crushed score line.
A collapsible box made of corrugated plastic comprising at least four vertical side walls and a bottom end flap integrally connected to each of said side walls through a hinge formed by a score line in said corrugated plastic, said score lines each including a perforated score and a parallel crushed score in the corrugated plastic and spaced vertically from one another and terminating short of the edges of said end flaps to reduce possible risk of tearing the corrugated plastic.
A collapsible box made of corrugated plastic comprising at least four vertical side walls separated by vertical hinge lines therebetween formed by score lines in the corrugated plastic and a bottom end flap integrally connected to each of said side walls through a hinge therebetween, said score lines forming said vertical hinge lines stopping short of the top and bottom of said side walls to reduce possible risk of tearing the plastic along the score lines, and each said hinge line between said side walls and said bottom end walls comprising a crushed score and a parallel perforated score line spaced vertically with respect to one another in said corrugated plastic.
A collapsible box made of corrugated plastic comprising at least four vertical side walls and a bottom end flap integrally connected to each of said side walls through a hinge line, and a hand hold cut into at least one of said side walls, said hand hold comprising a cut line through said corrugated plastic to define a hinged flap in the side wall with said cut line on both sides and the bottom of the flap and ending in a rounded corner at the top of each side of said flap, and wherein each said hinge line comprises a crushed score line and a perforated score line parallel to and vertically spaced from one another in said corrugated plastic.
Dependencies are inferred from the claim text.