B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
B28B 21/52 (2006.01) E04H 12/28 (2006.01) F23J 13/02 (2006.01) F23J 13/04 (2006.01)
Patent
CA 2308655
1.0 A process for manufacturing a ceramic internal pipe element for a chimney, which internal pipe element has rebates at its pipe ends for joining it to the next chimney internal pipe element. 2.0 It is known that chimney internal pipe elements of this type can be manufactured from a ceramic by an extrusion method, with the rebates being cut out of the end sections of the pipe ends after the chimney internal pipe elements have been cut into lengths. 21. In order that chimney internal pipe elements having rebates for joining them to the next chimney internal pipe element can be manufactured inexpensively, it is proposed that a chimney internal pipe element, which consists of a material comprising voids, is compressed all round from the inside to the outside to about half its wall thickness to form a rebate at one of its end sections, and is compressed all round from the outside to the inside to about half its wall thickness to form a rebate at the other of its end sections.
Fetherstonhaugh & Co.
Jacob Plein-Wagner Sohne Steinzeugwarenfabrik Gmbh & Co. Kg
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