APPARATUS USED FOR HYDRAULICALLY PERFORATING

Brand	Owner	Address	Description
ABRASIJET	DOW CHEMICAL COMPANY, THE	2211 H.H. Dow Way MIDLAND MI 48674	APPARATUS USED FOR HYDRAULICALLY PERFORATING WELL CASINGS, CEMENT, AND WELL FORMATIONS;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A perforation apparatus particularly useful for creating perforations in a foam-in-bag cushion and methods of using such apparatus are provided. The perforation apparatus is comprised of a frame, a main shaft mounted in the frame so as to be rotatable about a central axis, at least one needle roller coupled to the main shaft such that rotation of the main shaft moves the needle roller through a predetermined arc of motion out of and into an operative position adjacent to and perforating a plastic film advancing past the needle roller, and an actuator coupled with the main shaft and operable to rotate the main shaft so as to move the needle roller. Optionally, the apparatus is further comprised of at least one backup roller. Methods of preparing and perforating a foam-in bag cushion using the perforating apparatus are also provided.