# US 2013/0153561 A1 · Dental firing or press furnace > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0153561 A1 - Document ID: US20130153561A1 - Status: Published application - Kind: A1 - Application number: 13/406,698 - Filed: 2012-02-28 - Published: 2013-06-20 - Earliest claimed: 2011-03-02 - Assignees: Ivoclar Vivadent AG - Inventors: Rudolf Jussel - Web page: https://patentgrep.com/patent/US20130153561A1 ## CPC - F27B 5/10: Muffles - F27B 17/025: {for dental workpieces} - F27D 11/02: Ohmic resistance heating - A61C 13/20: Methods or devices for soldering, casting, moulding or melting {(A61C13/04, A61C13/081 take precedence)} - F27B: FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS - F27D: DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) ## Abstract The invention relates to a dental firing or press furnace (10) that enables the production of at least one dental restoration part (62). The dental firing or press furnace is provided with a firing space (12) that is heatable with the aid of a heating device (22), preferably, a resistance heating device. A heat-conducting element (50) having a specific thermal conductivity of at least 100 W/mK is arranged on the floor of the firing space (12). ## Claims ### Claim 1 A dental firing or press furnace for the production of at least one dental restoration part, comprising a firing space that is heatable with the aid of a heating device, and a heat-conducting element having a specific thermal conductivity of at least 100 W/mK is arranged on the floor of the firing space. ### Claim 2 (depends on 1) The furnace as claimed in claim 1, wherein the heating device comprises a resistance heating device. ### Claim 3 (depends on 1) The furnace as claimed in claim 1, wherein the heat-conducting element forms a footprint on its upper side, and acts as a carrier to support at least a restoration part, a firing tray with at least one restoration part, or a press muffle. ### Claim 4 (depends on 3) The furnace as claimed in claim 3, wherein the heat-conducting element is substantially formed in a disk-shaped manner and radially extends past the restoration part or the press muffle. ### Claim 5 (depends on 4) The furnace as claimed in claim 4, wherein the disk-shaped manner of the heat-conducting element comprises a circular disk-shaped manner. ### Claim 6 (depends on 5) The furnace as claimed in claim 5, wherein the heat-conducting element is spaced apart from the side wall of the firing space thereby forming a gap whose width is less than one third of its diameter. ### Claim 7 (depends on 6) The furnace as claimed in claim 6, wherein the gap is one fourth to one twentieth of its diameter. ### Claim 8 (depends on 7) The furnace as claimed in claim 7, wherein the heat-conducting element is centrally located on the floor of the firing space and comprises an edge or rim, wherein between the edge or rim and a circumferential side wall of the firing space a gap exists as an annular gap whose width remains constant throughout its run. ### Claim 9 (depends on 8) The furnace as claimed in claim 8, wherein the heat-conducting element comprises a height of one twentieth to one third of its diameter. ### Claim 10 (depends on 9) The furnace as claimed in claim 9, wherein the heat-conducting element comprises a height of approximately one tenth of its diameter. ### Claim 11 (depends on 10) The furnace as claimed in claim 10, wherein the heat-conducting element comprises silicon carbide (SiC), aluminum nitride (AlN) or molybdenum. ### Claim 12 (depends on 11) The furnace as claimed in claim 11, wherein the floor of the firing space comprises a thermal insulation material. ### Claim 13 (depends on 12) The furnace as claimed in claim 12, wherein the thermal insulation material comprises fireclay. ### Claim 14 (depends on 13) The furnace as claimed in claim 13, wherein the floor comprises a central recess, in which the heat-conducting element is accommodated in a partially ground-recessed manner. ### Claim 15 (depends on 14) The furnace as claimed in claim 14, wherein the heating device is arranged in a region of the side wall of the firing space and wherein the floor of the firing space is free from a heating device. ### Claim 16 (depends on 15) The furnace as claimed in claim 15, wherein the heat-conducting element is shaped as an alveolar or honeycombed carrier. ### Claim 17 (depends on 16) The furnace as claimed in claim 16, wherein the honeycombs of the alveolar or honeycombed carrier are shaped according to the type of a square pipe that extends vertically, and that the heat-conducting element is formed into lattice shape in the plan or top view. ### Claim 18 A method for operating a dental firing or press furnace, wherein at least one dental restoration part is produced, the furnace comprising a firing space that is heatable with the aid of a heating device, and a heat-conducting element having a specific thermal conductivity of at least 100 W/mK is arranged on the floor of the firing space, the method comprising: prior to conducting a heat treatment process in the firing space, a heat-conducting element having a specific thermal conductivity of at least 100 W/mK, is introduced and conducting a heat treatment cycle for the production of the dental restoration part when the firing space and the heat-conducting element have reached a preset operating or stand-by temperature. ### Claim 19 (depends on 18) The method according to claim 18, wherein the heat-conducting element is placed on the floor of the firing space and wherein the press muffle is then placed on top of the heat-conducting element before the firing and/or press cycle takes place. ### Claim 20 (depends on 20) The method according to claim 20 wherein a material is used for the heat-conducting element that is harder than the bottom or base part of the dental firing or press furnace.