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US 4,069,585 AGranted
Letter opener
OwnerAdolf Kusterinventor
Life of this patent
Estimating the term…
Abstract
A letter opener with a grip-type handle, a blade and a guide slot, wherein a lamellar blade pivots about its inner end and faces downward relative to the guide slot through which it penetrate into a slit aperture along one edge. The blade runs between the legs of a lamellar spring which is bent into a U-configuration and counters the pivot motion of the blade which has at both frontal corners a cutting face with ground edge facing downward relative to the base of the guide slot.
Claims5
A letter opener comprising:
- i. a handle body having:
- a. an elongated guide groove open at both ends, and
- b. an aperture opening in one side of said guide groove and
- c. a recess opening into the other side of the guide groove opposite said aperture;
- ii. a lamellar blade positioned in and extending from said recess across said guide groove and into said aperture, said blade having at each side of its portion which lies within the guide groove and the aperture, a cutting edge defined by a face lying at an oblique angle with respect to the base of the guide groove thereby to urge towards the base of the guide groove a letter moved along the guide groove into contact with the cutting edge;
- iii. means pivotably mounting the lamellar blade to the handle body such that the blade may pivot in both directions along the guide groove, and
- iv. spring means acting between the handle body and the lamellar blade to urge the blade into a rest position in which it extends across the guide groove.
4 more elements
Dependencies are inferred from the claim text.