Filter element having laser marked plastic components
First Claim
1. A filter element including a filter medium incorporated in an assembly having at least one plastic component, the at least one plastic component having a first portion comprising a material which chances color when exposed to laser energy to produce markings having a color different from the color of the at least one plastic component.
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Accused Products
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.
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Citations
14 Claims
- 1. A filter element including a filter medium incorporated in an assembly having at least one plastic component, the at least one plastic component having a first portion comprising a material which chances color when exposed to laser energy to produce markings having a color different from the color of the at least one plastic component.
- 7. A method of marking a filter element including a filter medium incorporated in an assembly having at least one plastic component comprising the steps of incorporating a material into a first portion of the at least one plastic component and treating the at least one plastic component with laser energy to produce markings at the material having a color different from the color of the plastic component.
Specification