US2319302A

US2319302A - Contact strip annealing furnace

Info

Publication number: US2319302A
Application number: US455104A
Authority: US
Inventors: Raymond W Cook
Original assignee: Associated Spring Corp
Current assignee: Barnes Group Inc
Priority date: 1942-08-17
Filing date: 1942-08-17
Publication date: 1943-05-18
Anticipated expiration: 1960-05-18

Description

' Patented May 18, 1943 i CONTACT smu ANNEAIJNG FUmAcE Raymond w. Cook, Bristol, comi', assitnor' to i Associated Spring Corporation,

Bristol, Count a corporation of Deiware b Application August 17, 1942; Serial No. 455104;

' 3Ciaims. (Ci. zaa-3) This application is .acontinuation in part of my co-pending application Serial No. 294',017, filed September 8, 1939, for Contact strip annealing furnace. i i

By the invention disclosedin this and the parent application I "provide means for heating metal strip, in which two imperforate, endless metallic belts are mounted on` pulleys so that parts thereof will be in opposed, face-to-face a relation and will be spaced sufflciently 'to engage the opposite faces of avstrip of metal therebetween, the belts and the strip'being moved to cause the Contacting partsthereof to travel together throughout a part of the total travelof the belts. and the belts being heated in order to transfer heat to the metal strip by conduction throughoutthe contacting length of the belts and strip.

It is the object of the invention particularly disclosed and claimed'in this application to. provide a strip heating apparatus' of the type 'described which includes means for diiferentially heating the longitudnal sides or edges of the metal strip.

Other objects and features of novelty of the invention will be made apparent by the following description and the annexed drawing' which, it will be understood, is merely illustrative of the invention, which is not limited in any way therer by or otherwise than by the appended claims.

Referring to the drawing, in'which similar reference numerals refer to like parts, v

Fig. 1 is a plan view oi' a heat treating apparatus according to the invention, taken on the line i--i of Flg. 2; I

Fig. 2 is a vertical sectlonal view of a heat treating apparatus according to my invention,

and v i Fig. 3 is a view of a second form of a heat treating apparatus embodying my invention.

It is often necessary to heat metal strip in such a way that one longitudinal part thereof is at a temperature different from that of another longitudinal part. By this invention I provide heating means, in general accordance with the invention described and claimed in theparent case and generally outlined hereinbefore, which are 'particularly adapted and intended to effect such differential heating. One form which such means may take is disclosed in Figs. 1 and 2 and comprises a pair of horizontal pulleys II, 12 which are rotatably mounted in a furnace chamber o and are positioned, respectively, adjacent the inlet and outlet ports i3 and id ofsuch furnace. Mounted on these pulleys il, z are two imperforate metallic belts li, !6 arranged in side-by-side relation. Above the pulleys li, 12 and parallel thereto area second pair of pulleys IT; !8 which also have mounted thereontwo imperi'orate metallic heating belts in side-by-side relation, only -one belt [9 of this pair being shown.- The belts and pulleys areso positioned that adi-acent reaches, such as I5a, isd, of the I belts are` in opposed, facevto-face parallel relation and are spaced 'apart sumciently to permit a metal strip to be positioned therebetween with its opposite sides or` faces in face-to-face contactual engagement with the spaced, opposed faces of the belts. The pulleys are driven by suitable means such as the belt 'driving means 20. The strip of metal z is pulled .through the furnace by reason of the frictional engagement between the opposite faces of the strip and the outer faces of adjacent reaches of the belts.

Banks of heating means 22, 23, 'diagramatically illustrated in the drawing as a plurality of radiant tube heating elements, project from each side of the furnace into the chamb'er and are preferablv so disposed within the chamber that all portions of the belts are heated. It should be clearly understoo'd that the invention is not 4 limited in any way to any particular form or type of heating means.

This invention may also 'be applied to a vertical or inclined type oi' furnace, as illustrated in Fig. 3 of the drawing. In this figure there is illustrated a vertically elongated furnace having disposed .therein two heating belts 30, 3| which are arranged in side-by-side relation and which are trained over pulley 32, a strip of metal 2i being maintained'in face-to-face contact with the belts in the manner hereinbefore described. A second pair of belts 33, 34, which are trained over and depend from a second pulley 35, may be disposed in contactual relationship to .the opposite face of the metal strip, if desired. Suitable heating means 36 are disposed in the furnace chamber and are shown as separate radiant may be effected by diflerential operation of the radiant tube heaters. The strip may overlap the beits in any desired proportion in order to differentiaily heat diflerent relative portionsthereof.

While I have described and iliustrated various forms which my invention may take, it will be apparent .to those skilled in the art that other embodiments of the invention may be made and that improvements and changes may be made therein, all without departing in any way from the spirit or scope oi the invention. for the limits of which reference must be had to the appended claims. i

What is claimed is:

1. An apparatus for diflerentiaiy heating longitudinal parts of a strip of metal. comprising two groups oi' endiess imperforate metaiiic belts, the belts of each group being arranged in sideby-side reiationend the belts of one group having parts thereof disposed in face-to-face relation to the corresponding parts of the beits of the second group and being spaced from such corresponding parts suflicientiy to receive a metal strip therebetween with the opposite faces of the metal strip in tace-to-face contactual engagement with the beits and in such a position lateraily of the beits that different iongitudinal parts of the strip are in face-'to-face contactuai engagement with diflerent belts of each group and means for diflerentially heating said beits to thereby diflerentially heat the strip.

2. An apparatus for differentially heating longitudinal parts of a strip of metal, comprising two groups of horizontaliy disposed, endiess, im-

perforate metaliic belts, the beits oi' each group being arranged in side-by-side relation and the belts of one group having parts thereot disposed in face-to-face reiation to the corresponding parte of the beits of the second group and being spaced from such corresponding parts sumcientiy to receive a metal strip therebetween with the opposite i'acesof the metal strip in face-to-iace contactual engagement with the belts and in such a position laterally of the beits that diflerent longitudinal parte oi the strip are in face-toface contactuai engagement with diflerent beits or each group, and means for diflerentially heating said belts to thereby diflerentiaiiy heat the strip. i

3. An apparatus !or diflerentiaiiy heating longitudinai parts of a strip of metal, comprising two groups oi verticaliy disposed endiess, imperforate metaiiic beits, the beits oi each group being arranged in side-by-side relation and the belts of one group having parts thereof disposed in face-to-iace relation to the corresponding i parts of .the belts of the second group and being spaced from such corresponding parts sumcientiy to receive a metal strip therebetween with the opposite faces o! the. metal strip in face-to-face contactual engagement with the belts and in such a position iateraiiy of the beits that diflerent longitudinal parts ot the strip are in faceto-face contactuaiengagement with diflerent belts oi' each group, and means for diflerentiaiiy heating said beits tothereby oiflerentiaiiy heat hamom) w. COOK.