Ergonomic writing instrument
OwnerJohn W. Bellueinventor
Life of this patent
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Abstract
A writing instrument having a ergonomic configuration and methods for making the instrument are provided. The instrument is elongated having an equilateral triangular cross-section and having a uniform partial twist along the length thereof. The partial twist permits flat surface engagement for the index finger, middle finger and for the hand between the base of thumb and the base of the index finger of the user. The uniform twist in combination with the equilateral cross-sectional shape also permits tight packing in bulk, and the partial twist permits flat sided engagement with the resting surface (desk top). A method for making the instrument in the form of a rigid pencil is also provided.
Claims9
A writing instrument comprising:
- (a) an elongated body having a uniform equilateral triangular cross-section along the length thereof said body having a uniform twist of between 150 degrees and 210 degrees along the length thereof, and
- (b) a writing element within said body.
A method for providing an ergonomic writing instrument having an elongated body having a uniform equilateral triangular cross-section along the length thereof, said body having a uniform twist of between 150 degrees and 210 degrees along the length thereof, said method comprising:
- (a) coextruding a lead and body compound to surround the lead with a fluid compound;
- (b) passing the lead and surrounding fluid compound through a rotating die having a triangular opening;
- (c) hardening the compound to provide a blank having a spiral triangular cross-sectional rigid body and a central graphite writing element;
- (d) cutting the blank to produce an unsharpened writing instrument.
Dependencies are inferred from the claim text.