Patent ID: 7698874
Filing Date: 2010-04-20
Classification: B31D

Abstract:
1. A method of making gas-filled filling bodies, comprising the steps of: unwinding from a supply reel a pre-fabricated half-tubular plastic film, which has an at least partly open border side and is divided into individual pockets by weld seams; blowing air laterally into the pockets of the plastic film as the plastic film moves continuously past a gas filling device in a substantially horizontal plane; and moving the plastic film past a welding tool for welding the open border side of the plastic film in an air-tight manner, wherein a transport of the plastic film is effected by a drive unit which applies a force upon the plastic film in transport direction solely downstream of the gas filling device and downstream of a site of application of the welding tool and has two electric motor driven rollers which abut one another in a circumferential region, with one of the rollers configured as an abutment for the welding tool, wherein each of the rollers defines a rotation axis, with the rotation axes of the rollers arranged behind one another in transport direction.