Folding rule

Details Folding rule Folding rule

2006-09-26

2006-09-26

Bennett, G. Bradley (Department: 2859)

Geometrical instruments

Straightedge type

Plural straightedges, relatively moveable

C033S493000

Reexamination Certificate

active

07111408

ABSTRACT:
A folding rule includes a plurality of segments having length indicating indicia thereon, including a plurality of intermediate segments having a length to thickness ratio in the range of 40:1 to 60:1; the segments pivotally connected together and pivotally moveable between a collapsed configuration wherein the segments are stacked and an extended configuration wherein the segments are linearly aligned along a measurement axis, wherein at least one intermediate segment rotates by approximately 180° with respect to an adjacent intermediate segment to move between the collapsed configuration and the extended configuration; the segments formed of a generally homogenous electrically non-conductive mixture of wood and plastic. The intermediate segments may be substantially identical except for the length indicating indicia thereon, and at least the intermediate segments may be hydrophobic and be formed of a generally homogenous mixture of wood and ABS plastic. A method of forming such folding rules is also disclosed.

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