Filter element having laser marked plastic components

Details Filter element having laser marked plastic components Filter element having laser marked plastic components

1997-04-04

1998-08-25

Walker, W. L.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

2105001, 106635, 106712, 427145, 427514, 427554, B01D 2708

Patent

active

057980373

ABSTRACT:
The filter element comprises a filter medium which is incorporated into an assembly made of plastic components. At least one of the components incorporates titanium dioxide as a filler. The treatment of such a component with a laser produces a dark pigment within the component and thus can be used to form characters on the component to convey information regarding the filter element such as product part number, lot code, serial number or flow arrow.

REFERENCES:
patent: 4601820 (1986-07-01), Leason
patent: 4959406 (1990-09-01), Foltin et al.
patent: 4986904 (1991-01-01), Bugar et al.
patent: 5053440 (1991-10-01), Schueler et al.
patent: 5501827 (1996-03-01), Deeney et al.

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