(19)
(11) EP 0 057 091 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
27.10.1982 Bulletin 1982/43

(43) Date of publication A2:
04.08.1982 Bulletin 1982/31

(21) Application number: 82300316

(22) Date of filing: 21.01.1982
(84) Designated Contracting States:
DE FR IT NL SE

(30) Priority: 23.01.1981 GB 8102122

(71) Applicant: ROBERT BION & COMPANY LIMITED
 ()

(72) Inventor:
  • Bion, Walter R.H. c/o Robert Bion & Company Ltd.
     ()

   


(54) Improvements in refrigerator heat exchangers


(57) A heat exchange unit mainly for a refrigerator comprises a sheet of metal which has been perforated by punching using a roller having a plurality of teeth which causes material to be displaced to form a rectangular perforation and the displaced material to be bent to one side of the sheet around the perforation. The roller forms a series of lines of perforations 2 between which is left an unperforated strip 3 having indentations 4 to which is spot welded the condenser tubing 5 in the form of a serpentine.






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