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US 6,332,570 B2Granted
Flat transparent magnifying envelope
OwnerWilli Freiinventor
Life of this patent
Estimating the term…
Abstract
A flat transparent envelope has a rectangular, transparent cover sheet and a rectangular, preferably transparent backsheet. The cover sheet and backsheet are preferably flexible films that are joined together along at least two but no more than three of the sheet edges so that the envelope is open along at least one of the sheet edges and the edges of the joined sheets are situated in the envelope plane. The transparent cover sheet and backsheet may advantageously be entirely formed of a magnifying material.
Claims12
An envelope, comprising:
- a flexible and transparent cover sheet having a first edge and a second edge, wherein the cover sheet is a magnifying film;
- a flexible back sheet having a first edge and a second edge;
- and
- wherein the first edge and the second edge of the cover sheet are directly joined to the first edge and the second edge of the back sheet to form a flexible envelope such that an object disposed between the cover sheet and back sheet is not magnified when the cover sheet and back sheet rest on the object, and that the object is magnified when a user raises the cover sheet from the object.
1 more element
Dependencies are inferred from the claim text.