Wood crossties with cellular plastic inserts

Details Wood crossties with cellular plastic inserts Wood crossties with cellular plastic inserts

1976-12-09

1979-01-16

Paperner, L. J.

Railways: surface track

Fastenings

Spikes

238 84, E01B 916

Patent

active

041345460

ABSTRACT:
A wooden structure incapable of holding a fastening device is restored by boring a hole of a desired size into the structure, cleaning the hole, and introducing a cellular plastic insert of a suitable size, so that the insert can hold a fastening device driven thereinto. The method is particularly useful for restoring a "spike-killed" railroad crosstie; the insert is composed of cellular high density polyethylene having average bulk density from about 15 to 50 pounds per cubic foot.

REFERENCES:
patent: 1598249 (1926-08-01), Parsons
patent: 2050432 (1936-08-01), Hayes
patent: 3813040 (1974-05-01), Heinemeyer
patent: 3939617 (1976-02-01), Eisses
Modern Plastics, "Always Something New in Urethane Foam, " pp. 92-96, Aug. 1967.

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