Loading patent…
AssigneeDynamit Nobel Aktiengesellschaft
InventorsWerner Kannengiesser, Karl-Heinz Lulsdorf, Franz-Josef Biermanns, Hans-Heinz Heidbuchel
Estimating the term…
A fuse having a protective jacket is utilized, for example, in petroleum exploration at large depths where the fuse must withstand high temperatures and pressures. The jacket is produced from a shrinkable hose that is shrink-fitted onto the unfinished cord which latter contains an explosive. The hose consists preferably of radiation-crosslinked polyethylene. The use of a shrink-fitted hose eliminates long preparation and curing times for the synthetic resin jacket. The process temperatures required during heat shrinking are no threat to the safety against ignition of the explosive. It is possible in accordance with the process to manufacture, in particular, fuses for high pressures and high ambient temperatures, without any problems.
A process for producing a jacketed fuse wherein a cord comprising a preshaped elongated explosive is surrounded by a synthetic resin jacket, characterized by positioning the cord within a shrinkable hose made of a synthetic resin which shrinks upon being contacted with an oxygen-containing gas said hose having an inner diameter that is substantially greater than an outer diameter of the cord, and contacting the hose with said gas to shrink the hose onto the cord to provide the jacketed fuse.
A process for producing a jacketed fuse wherein a cord comprising a preshaped elongated explosive is surrounded by a synthetic resin jacket, characterized by positioning the cord within a shrinkable hose made of a synthetic resin which shrinks upon being treated, said hose having an inner diameter that is substantially greater than an outer diameter of the cord, the non-jacketed cord being introduced into the hose by blowing a gas through the hose and entraining the cord with the gas, and treating the hose to shrink the hose onto the cord to provide the jacketed fuse.
A jacketed fuse comprising a cord comprising a preshaped elongated explosive, which cord is surrounded by a jacket, characterized in that the jacket consists of a shrunk-fitted hose of synthetic resin which tightly contacts the outer contour of the core;
A process for producing a jacketed fuse wherein a cord comprising a preshaped elongated explosive is surrounded by a synthetic resin jacket, characterized by positioning the cord within a shrinkable hose made of a synthetic resin which shrinks upon being treated, said hose having an inner diameter that is substantially greater than an outer diameter of the cord, and treating the hose to shrink the hose onto the cord to provide the jacketed fuse;
Dependencies are inferred from the claim text.