Collapsible cardboard concrete form
OwnerMarty Huntinventor
Life of this patent
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Abstract
A collapsible cardboard concrete form is disclosed. In a particular embodiment the form includes a cardboard box beam having a depressed longitudinal section along an outer portion of its length for added structural integrity. A lateral notch is disposed in the outer portion of the form at intervals and across a width of the form to divide the form into what will be the sides of the form when assembled. The lateral notches include a flexible planar connector of an inner portion of the form to allow the notch to act as a hinge and bend to create each corner of the form. A tab extends from one end of the form and is used to tuck in an opposing end of the form. The surfaces of the form may be coated with wax, or other sealant, to prevent moisture damage to the form as the concrete is curing.
Claims16
A collapsible concrete form, the form comprising:
- a box beam comprised of cardboard, wherein the form is configured to move from a collapsed position to an assembled position to create a desired shape that will hold concrete;
- a depressed longitudinal section along an outer portion of a length of the box beam;
- a plurality of intermediate lateral notches disposed in the outer portion of the box beam and across a width of the box beam, wherein the intermediate lateral notches are spaced apart from each other along the box beam;
- a tab extends from a first end of the box beam is configured to tuck into an opposing second end of the box beam to secure the first end and the second end of the box beam together into the desired shape;
- and
- a flexible connector of an inner portion of the box beam disposed at each intermediate lateral notch and configured to act as a hinge to create a corner of the form;
- wherein the box beam is configured to be collapsible and folded flat back over itself about the intermediate lateral notches for storage and transport.
A collapsible concrete form, the form comprising:
- a box beam having a first end and an opposing second end;
- a depressed longitudinal section along an outer portion of a length of the box beam;
- a plurality of intermediate lateral notches disposed in the outer portion of the box beam and across a width of the box beam;
- and
- a flexible connector of an inner portion of the box beam disposed at each intermediate lateral notch and configured to act as a hinge to create a corner of the form.
A collapsible concrete form, the form comprising:
- a box beam having a first end and an opposing second end configured to secure together to define a desired continuous shape of a void to receive concrete therein;
- and
- a plurality of flexible lateral connectors intermediately disposed along the box beam and configured to act as a hinge about which to fold the box beam from a collapsed position to an assembled position.
Dependencies are inferred from the claim text.