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US 4,747,190 AGranted
Apparatus for inflating a length of tubular material
AssigneeBruckner Apparatebau GmbH
InventorWerner Koch
Life of this patent
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Abstract
The invention relates to apparatus for inflating a continuously moving length of tubular material, in which the nozzle tube is rotatable and an arrangement is provided which locks the nozzle tube in an angular position in which the nozzle is in contact with the length of material during the discharge of gas from the nozzle. Such apparatus is distinguished during the greater part of the production time by a considerable reduction in the friction between the length of material and the nozzle tube.
Claims3
Apparatus for inflating a continously moving length of tubular material (2) with a gaseous medium, containing
- (a) a nozzle tube (4a) which is arranged at right angles to the length of material (2), is in contact with the length of material and has at least one nozzle (4a') for discharging the gaseous medium into the tubular material
- (b) an arrangement for controlling the discharge of the gaseous medium from the nozzle (4a'), characterised by the following features:
- (c) the nozzle tube (4a) is arranged so as to be rotatable,
- (d) an arrangement (13, 14) is provided which locks the nozzle tube (4a) in an angular position in which the nozzle (4a') is in contact with the length of material (2) during the discharge of the gaseous medium from the nozzle (4a'),
- (e) the nozzle tube (4a) is mounted so as to be freely rotatable and to be entrained by the moving material (2) when the nozzle tube is not locked.
2 more elements
Dependencies are inferred from the claim text.