The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 2006
Filed:
Dec. 29, 2004
Ronald C. Johansson, Stillwater, MN (US);
James L. Bries, Cottage Grove, MN (US);
Ronald C. Johansson, Stillwater, MN (US);
James L. Bries, Cottage Grove, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
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.