Pressure indicating structure

Details Pressure indicating structure Pressure indicating structure

2006-10-17

2006-10-17

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Dynamometers

Responsive to force

C073S762000

Reexamination Certificate

active

07121155

ABSTRACT:
A pressure indicating structure comprising (1) a translucent or transparent sheet including reflective structure defining at least a portion of a second surface of that sheet for reflecting back through a first opposite surface of the sheet light entering the sheet through its first surface, that reflective structure comprising a multiplicity of peak portions and recessed portions having recessed surface portions of the second surface that define recesses from the peak portions; and (2) a deformable layer comprising pressure sensitive adhesive having a major surface along the second surface of the sheet over the peak portions of the reflective structure. A predetermined pressure between the first surface of the sheet and the surface of the deformable material opposite the reflective structure can deform the pressure sensitive adhesive into the recesses to wet part or all of the recessed surface portions of the reflective structure thereby causing light to pass through the second surface along the wetted recessed surface portions instead of being reflected, which is visually observable to indicate that the predetermined pressure has been applied.

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patent: 05-172666 (1993-07-01), None
patent: 09-015072 (1997-01-01), None
patent: 2000-136357 (2000-05-01), None

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