Method for preparing baked pencil leads using concentric straigh

Details Method for preparing baked pencil leads using concentric straigh Method for preparing baked pencil leads using concentric straigh

1995-02-09

1996-07-09

Kuhns, Allan

Plastic and nonmetallic article shaping or treating: processes

Orienting or aligning solid particles in fluent matrix material

264 49, 26421111, B29C 4770

Patent

active

055342060

ABSTRACT:
Baked pencil leads in which a filler such as flaky graphite is oriented in a concentric tubular form in an outer peripheral portion of each lead and which has one or more layers spaced in a radial direction from the outer peripheral portion and comprising the filler oriented in the concentric tubular form between the central portion and the outer peripheral portion of each lead and in which the filler is at random or radially oriented in the other portions of each lead. The baked pencil leads can be obtained by the use of a plurality of concentric conical tubular straightening plates having the sectional area of a flow path continuously decreased toward a nozzle orifice, in extruding a kneaded material mainly comprising the filler and a binder. In the baked pencil leads, strength can be remarkably improved without lowering density, and thus these baked pencil leads are excellent in the balance between the strength and the density.

REFERENCES:
patent: 1911858 (1933-05-01), Trebes
patent: 1978163 (1934-10-01), Megow
patent: 2790202 (1957-04-01), Lorenian
patent: 2988784 (1961-06-01), Lorenian
patent: 3168509 (1965-02-01), Juel
patent: 3254143 (1966-05-01), Heitman
patent: 3350485 (1967-10-01), Shesler et al.
patent: 3447203 (1969-06-01), Campbell
patent: 3791504 (1974-02-01), Wiser et al.
patent: 4826422 (1989-05-01), Hunter
patent: 4853167 (1989-08-01), Bard et al.

Affiliated with

Also associated with

Rating

Method for preparing baked pencil leads using concentric straigh does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for preparing baked pencil leads using concentric straigh, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for preparing baked pencil leads using concentric straigh will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1865257