MACHINE TO PRODUCE PERFORATED METAL STOCK

摘要

A machine to form a plurality of perforations in an elongate strip of material is provided. The machine includes opposed first and second wheels that receive the strip therethrough. The first wheel has a plurality of spaced teeth each disposed at a lateral position about the circumference of the first wheel with consistent spacing therebetween. The second wheel has two or more radial projections that each are disposed outboard of the plurality of spaced teeth in the first wheel. The interaction of the plurality of teeth and radial projections upon the elongate strip forms a plurality of perforations in the strip. Opposed third and fourth wheels are provided after the first and second wheels. The fourth wheel includes at least one indented portion that is aligned to interact with flared portions from the elongate strip and urge the flared portions toward the remaining surface of the elongate strip.

主权项

1. A machine for producing a perforated elongate strip, comprising:
a rotatable first wheel aligned to rotate about a first rotational axis, the first wheel having an outer circumferential surface, the first wheel comprising a plurality of first teeth that each radially extend from the outer circumferential surface such that each tooth of the plurality of first teeth are disposed upon a first lateral position upon a width of the outer circumferential surface, with each of the plurality of first teeth being positioned with a space disposed between neighboring teeth of the plurality of first teeth, wherein each of the plurality of first teeth have opposite first and second side surfaces that each face a direction parallel to the first rotational axis, each of the plurality of first teeth includes a cutting edge; a rotatable second wheel aligned to rotate about a second rotational axis, the second wheel includes a first radial projection and a second radial projection spaced from the first projection, where each of the first and second projections extend radially outward around an entire outer circumference of the second wheel a constant radial distance, wherein each of the first and second radial projections are disposed at respective first and second lateral widths of the second wheel, wherein the first radial projection is disposed just outboard of the collective first side surfaces of the plurality of first teeth, and the second radial projection is disposed just outboard of the collective second side surfaces of the plurality of first teeth; and the machine is configured to supply an elongate strip of material between the first and second rollers such that a tooth from the first plurality of teeth and the first and second radial projections simultaneously interact with the elongate strip when provided therebetween, and such that rotation of the first wheel in the first direction urges the elongate strip to longitudinally translate therethrough, wherein in use, the plurality of first teeth each cut and extend through the elongate strip to create a plurality of longitudinally aligned apertures in a central portion of the elongate strip and bend portions of the elongate strip to form flared portions that extend toward the second wheel, with flat portions of the elongate strip neighboring each of the plurality of apertures.