US 6,656,407 B1Granted

Axially movable cluster conduits for plastic processing in a screw machine

AssigneeDMX, Inc.

InventorsDonald N. Halgren, Desider G. Csongor

Life of this patent

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Abstract

The invention comprises a plasticating machine for the working and forcing of plastic material into a mold, said machine including an elongated housing having a first or proximal end and a second or distal end, an elongated screw shaft with a screw flight therearound, the screw shaft being rotatably supported in the elongated housing, for the working of plastic between the screw shaft and the elongated housing with at least one delivery conduit generally longitudinally arranged through the screw shaft, from a proximal end to a distal tip end thereof. The conduit may be arranged to be movable with respect to the screw shaft to permit delivery of a medium through the screw shaft to any plastic being driven from the machine. The medium may be any single or combination of components selected from the group comprising vapor, liquid, gas, powder or solid, to control the machine or treat any plastic being driven therefrom.

Claims8

Dependent claims

A method of introducing a gas, liquid and/or vapor into a plastic worked by a plasticating screw machine having a rotatable screw supported in a barrel housing, said machine feeding worked plastic into a mold or die, comprising the steps of:

arranging a proximal end of a supply conduit into a gas, liquid and/or vapor source so as to permit the delivery of a gas, liquid and/or vapor from said source to a distal end of said conduit directed into a plastic being worked by said plasticating machine;
attaching a jewel orifice to said distal end of said conduit to minimize any wear and abrasion of said orifice during delivery of a gas, liquid and/or vapor to said plastic being worked by said plasticating machine;
directing said gas, liquid and/or vapor source to pressurize a gas, liquid and/or vapor through said jeweled orifice;
rotating said screw to introduce plastic into said mold or die;
and
introducing said gas, liquid and/or vapor into said plastic in said mold or die as it is being introduced into said mold or die;
placing said distal end of said supply conduit in said rotatable screw so as to permit said gas, liquid and/or vapor to discharge from a jewel orifice in said rotatable screw.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/385,318Filed 30 Aug 1999 · division
Priority: 23 Feb 1995
Granted: 2 Dec 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification32 codes

A61M 25/0009
Catheters; Hollow probes: making of catheters or other medical or surgical tubes
A61M 25/0014
Making of catheters or other medical or surgical tubes: connecting a tube to a hub
B29C 45/1732
Introducing an auxiliary fluid into the mould: control circuits therefor
B29C 45/1734
Introducing an auxiliary fluid into the mould: nozzles therefor

Family

Application08/393,200Parent of this continuation-in-part · filed 23 Feb 1995
Application08/511,055Parent of this continuation-in-part · filed 3 Aug 1995
Application08/773,875Parent of this division · filed 30 Dec 1996
Application08/877,139Parent of this division · filed 17 Jun 1997
US 5,945,061 AParent of this division
US 5,744,092 AParent of this division
Application08/773,875Parent of this continuation-in-part
US 5,670,112 AParent of this continuation-in-part
US 6,656,407 B1This patent

From the US filing history. Foreign family members aren’t listed.