Smart microwave packaging structures

35 Pages·2013·2.52 MB·English

USOO5864123A
United States Patent [19] [11] Patent Number: 5,864,123
Keefer [45] Date of Patent: Jan. 26, 1999
[54] SMART MICROWAVE PACKAGING 4,990,735 2/1991 Lorensonetal. ..................... .. 219/728
STRUCTURES 5,117,078 5/1992 Beckett ........ .. .. 219/729
5,260,537 11/1993 Beckett .. 219/728
[76] Inventor: Richard M. Kee~ fer, 221 Hayes Line, , , 12; $50a 11e?r“s e a. ........................ .~.~
Omemee’ Ontano’ Canada’ KOL 2W0 5,519,195 5/1996 Keefer et a1. ......................... .. 219/728
[21] App1_ No; 529,074 Primary Examiner—Philip H. Leung
Attorney, Agent, or Firm—Jane Parsons
[22] Filed: Sep. 15, 1995
[57] ABSTRACT
Related [18' Apphcatlon Data Active elements are described Which modify the heating of
[63] Continuation-in-part of Ser. No. 458,419, Jun. 2, 1995, foodstuffs and other mlcrowave'heetable_loads and WhIFh
abandoned are responsive to changes of load dielectric properties With
temperature or as a result of changes of state, composition
[51] Int. Cl.6 ..................................................... .. H05B 6/80 or density during heating, to the presence of absence of
U-S- Cl- ........................ .. loads, and to the presence Or absence of adjacent dielectric
426/234; 99/DIG~ 14 materials. The active elements, Which may be looped slots or
[58] Field Of Search ................................... .. 219/728, 729, strips, are constituted so as to be or become resonant or
219/730, 759, 734, 735; 426/107, 109, non-resonant during microwave heating of the load in
234, 243; 99/DIG- 14 response to the presence or absence of the load or the
presence or absence of adjacent dielectric material. The
[56] References Cited elements conveniently may be constructed of electrocon
Us‘ PATENT DOCUMENTS ductive metal or arti?cial dielectric material.
4,814,568 3/1989 Keefer ................................... .. 219/728 11 Claims, 14 Drawing Sheets
Isl?
U.S. Patent Jan. 26, 1999 Sheet 1 0f 14 5,864,123
F'G.1_
FIGA
FIG-6.
U.S. Patent Jan. 26, 1999 Sheet 2 0f 14 5,864,123
FIG.7. FIG-8
|E|
%
F|G.9. F|G.10.
, IEIZ % / %
FIG.11. FIG.12.
U.S. Patent Jan. 26, 1999 Sheet 3 0f 14 5,864,123
FIG.13.
FIG.15.
//////I//l/l///l /////////////////
FIG.17. F|G.18.
U.S. Patent Jan. 26, 1999 Sheet 4 0f 14 5,864,123
U.S. Patent Jan. 26, 1999 Sheet 5 0f 14 5,864,123
FIG.23. FIG.24
FIG-25. FIG.26.
U.S. Patent Jan. 26, 1999 Sheet 6 0f 14 5,864,123
FIG.29. FIG-3°
FIG.31 . FIG.32.
U.S. Patent Jan. 26, 1999 Sheet 7 0f 14 5,864,123
FIG. 33
(D
FIG. 34
U.S. Patent Jan. 26, 1999 Sheet 8 0f 14 5,864,123
FIG. 35A