GB2121674A - Stainless steel cookware - Google Patents
Stainless steel cookware Download PDFInfo
- Publication number
- GB2121674A GB2121674A GB08315319A GB8315319A GB2121674A GB 2121674 A GB2121674 A GB 2121674A GB 08315319 A GB08315319 A GB 08315319A GB 8315319 A GB8315319 A GB 8315319A GB 2121674 A GB2121674 A GB 2121674A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shell
- protective cover
- oxidisable
- layer
- cover layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Cookers (AREA)
Abstract
A cooking vessel includes two layers 4 and 6 that form a bottom member secured to a stainless steel shell 1. Layer 4 of an oxidisable ferrous metal, for instance a disc of mild steel, covers at least a part of the undersurface of the base 2 of the shell. Layer 6 is a protective cover layer, preferably of copper, having a thickness of at most 1.5mm. Layer 6 encloses the otherwise exposed surfaces of layer 4 by being attached to the base 2 of the shell or a lower portion of the side walls 3 of the shell (Figs. 3-6, not shown). The bottom member contributes physical and thermal stability to the vessel and enables one to achieve a greater weight addition per unit cost than in conventional stainless steel cookware. <IMAGE>
Description
SPECIFICATION
Stainless steel cookware
The invention relates to a cooking vessel comprising a stainless steel shell and a bottom member that comprises a layer of oxidisable ferrous metal and a protective cover layer.
Stainless steel is used to make shells comprising a base and upstanding side walls for use in the cookware field. The metal has a number of advantages. It resists oxidation and washing solutions. It is easy to clean. Its resistance to wear is good. It can be made with a bright finish which is pleasing in appearance and will not dull or stain appreciably with age or use.
However stainless steel has the disadvantage of having a poor thermal conductivity. As a result the stainless steel surface in contact with food during use may have localised overheated areas. To overcome this problem a material of higher thermal conductivity is applied to the bottom exterior of the sheil.
Copper or aluminium is normally used to this purpose.
Another disadvantage of stainless steel is that it an expensive material. Hence in order to ensure the lowest possible costs in a very competitive market, the absolute minimum shell thickness is generally used. As a result the weight of the finished cooking vessel may not be as great as one would wish from the standpoint of customer confidence in terms of balance and stability in use.
The thin gauges used may also give problems with base distortion when heated. This can be a particularly troublesome problem with frypans.
British Patent Application Publication No.
201437A discloses a stainless steel container with a thermo-radiating bottom comprising a layer of aluminium and a layer of steel or iron firmly anchored in the aluminium layer. The particular dimensions given in the reference contemplate a bottom comprising a layer of iron or steel having a thickness of from 0.20 mm to 3 mm interposed between two aluminium layers each having a thickness of 3 mm to 20 mm. The stated purpose of the iron or steel layer is to enable the container to be heated by means of induced electric currents.
The present invention provides a cooking vessel comprising (a) a stainless steel shell having a base and upstanding side walls; and (b) a bottom member secured to the said shell, the bottom member comprising (i) a layer of oxidisable ferrous metal that covers at least a portion of the undersurface of the base of the shell and (ii) a protective cover layer enclosing the otherwise exposed surfaces of the layer of oxidisable ferrous metal by being attached to the base of the shell or a lower portion of the side walls of the shell; the thickness of the protective cover layer being at most 1.5 mm.
The shell of stainless steel preferably has a thickness within the range of 0.3 mm to 2.5 mm. The thickness may be, for instance, within the range of 0.3 mm to 1 mm in the case of ordinary cooking vessels or 0.8 mm to 1.5 mm where a more substantial shell is required, for instance, in the case of a pressure cooker. The bottom member of the cooking vessel of the invention is applied to at least a portion of the undersurface of the base of the shell, and, if desired, a lower portion of the external surface of the side walls of the shell. The other surfaces of the shell including the cavity, i.e. the internal surfaces, and the upper part of the external side of the side walls are preferably uncovered so as to present the pleasing appearance of stainless steel.
The bottom member secured to the shell comprises two parts-the layer of oxidisable ferrous metal and the protective layer. The layer of oxidisable ferrous metal is preferably a plate located on at least a portion of the undersurface of the base of the shell. The plate is advantageously in the shape of a disc.
Alternatively the layer of oxidisable ferrous metal may be a plate having an upstanding peripheral flange. In this case the flat area of the plate engages the undersurface of the base of the shell and the upstanding peripheral flange is designed to engage only a lower portion of the external side of the side walls of the shell.
The layer of oxidisable ferrous metal may be iron or may be a steel having a tendency towards oxidation, for instance, carbon steel or mild steel. The metal is most advantageously mild steel. The thickness of the layer of oxidisable ferrous metal on the undersurface of the base of the shell is preferably within the range of 0.5 mm to 6 mm depending upon the particular item of cookware more preferably 1 mm to 4 mm. Normally this thickness will be greater than that of the shell.
Because an oxidisable ferrous metal such as iron, mild steel or carbon steel has a tendency to rust, the otherwise exposed areas of the layer of this material are enclosed by a protective layer engaging the base of the shell or a lower portion of the external side of the side walls of the shell. The engagement should be an effective seal so as to prevent exposure of the oxidisable ferrous metal to the atmoshpere and entry of corrosive media. The protective cover layer should be of wear resistant material that does not chip in use so as to expose the oxidisable ferrous metal and thereby permit rusting to begin. The protective cover layer is preferably made of a metal, preferably stainless steel or copper, advantageously copper.
The thickness of the layer of oxidisable ferrous metal located on the undersurface of the base of the shell is preferably greater than the thickness of the adjacent portion of the protective cover layer. Thus the oxidisable ferrous metal is preferably the major contributor to the thickness of the bottom member beneath the undersurface of the base of the shell. The thickness of the protective cover layer may be within the range of 0.2 mm to 1 mm, more preferably 0.4 mm to 0.6 mm. The protective cover layer is preferably made by shaping protective cover layer material around a portion of the surface of the layer of oxidisable ferrous metal.
The three components of the cooking vessel may be secured together in known manner, for example, by brazing or soldering.
The invention also provides a process for making a cooking vessel comprising (i) a stainless steel shell having a bass and upstanding side walls and (ii) a bottom member comprising a layer of oxidisable ferrous metal that covers a portion of the undersurface of the base of the shell and a protective cover layer enclosing the otherwise exposed surfaces of the layer oxidisable ferrous metal by being attached to the undersurface of the base of the shell and, if desired, a portion of the protective cover layer may also be attached to a lower portion of the upstanding side walls of the shell; which process comprises (a) applying a layer of oxidisable ferrous metal having first and second opposite faces to protective cover layer material having a thickness of at most 1.5 mm; the protective cover layer material having inner and outer portions such that the inner portion is applied to the first face of the layer of oxidisable ferrous metal and the outer portion extends beyond the periphery of the layer of oxidisable ferrous metal; (b) applying pressure to the protective cover layer material so as to form the outer portion thereof around the periphery of the layer of oxidisable ferrous metal until the outer portion of the protective cover layer material reaches the plane of the second face of the oxidisable ferrous metal whereby the surfaces lying in the said plane are adapted to be secured to the undersurface of the base of the stainless steel shell and, if desired, a part of the outer portion of the protective cover layer material may be subjected to further shaping whereby the said part is adapted to be secured to a lower portion of the upstanding side walls of the shell; and (c) securing the layer of oxidisable ferrous metal and the protective cover layer material to the shell so as to provide the aforesaid bottom member attached to the shell.
The components of the cooking vessel are preferably secured together by brazing or soldering. For this purpose solder or brazing material may be interposed between the said first face of the layer of oxidisable ferrous metal and the inner portion of the protective cover layer before the shaping step (b). Alternatively the two components of the performed bottom member may be separated after shaping step (b) and solder or brazing material may then be interposed between the layer of oxidisable ferrous metal and the protective cover layer. Solder or brazing material may be interposed between the preformed bottom member and the base of the stainless steel shell for the purpose of step (c) of the process.
The cooking vessel is preferably constructed so that a cavity exists between the formed portion of the protective cover layer, the periphery of the layer of oxidisable ferrous metal and the base of the stainless steel shell. The cavity is filled with solder or brazing material so as to form a sealing bead of solder around the periphery of the joint.
The invention will now be particularly described by way of example with reference to the accompanying drawings in which
Figure 1 is a cross-sectioned elevational view of a cooking vessel comprising a stainless steel shell and a bottom member;
Figure 2 is an enlarged view of a detail of
Fig. 1;
Figure 3 is a cross-sectioned elevational view of another embodiment of a cooking vessel comprising a stainless steel shell and a bottom member;
Figure 4 is an enlarged view of a detail of
Fig. 3;
Figure 5 is a cross-sectioned elevational view of a third embodiment of a cooking vessel comprising a stainless steel shell and a bottom member;
Figure 6 is an enlarged view of a detail of
Fig. 5 and
Figures 7 and 8 are cross-sectioned elevational view of shaping equipment in use for making the bottom member.
With reference to Figs. 1 and 2, the cooking vessel comprises a stainless steel shell or body 1 having a base 2 and upstanding side walls 3. The thickness of the shell may be from 0.3 to 1.5 mm. A disc 4 made of oxidisable ferrous metal, preferably mild steel, has one face engaging the central region of the undersurface 5 of the base 2 of the shell.
The disc 4 may have a thickness of 0.5 to 6 mm. The disc 4 and an associated protective cover layer 6 together form a bottom member on the shell. The protective cover layer 6 covers the opposite face 7 of the disc 4, extends around the periphery 8 of the disc 4 and terminates in a portion 9 engaging the undersurface 5 of the base 2 of the shell. The protective cover layer 6 is preferably made of copper and may be about 0.5 mm thick. The disc 4, protective cover layer 6 and base 2 of the stainless steel shell are secured together preferably by solder or with brazing material which may be located between the engaging surfaces of components 2, 4 and 6 of the vessel.In order to ensure a sound joint we prefer to shape the portion 9 of the protective cover layer 6 engaging the undersurface 5 of the base 2 of the shell so that a cavity 10 is defined between the protective cover layer 6, the uppermost portion of the periphery 8 of the disc 4 of oxidisable ferrous metal and the undersurface 5 of the base 2 of the shell. The cavity 10 is occupied by solder so that a sealing bead of solder around the periphery of the joint prevents exposure of the oxidisable ferrous metal to the atmosphere and/or entry of corrosive media.
Figs. 3 and 4 illustrate another embodiment of the cooking vessel of the invention. The vessel comprises a stainless steel shell or body 1 having a base 2 and upstanding side walls 3. The lowermost portion 21 of the side walls 3 define a hollow frusto-conical shape that inclines outwardly from the periphery of the base 2. A disc 4 made of oxidisable ferrous metal has a diameter a little smaller than that of the base 2 of the shell 1. The disc 4 engages the undersurface 5 of the base 2.
The disc 4 and an associated protective cover layer 6 having a thickness of at most 1.5 mm, preferably about 0.5 mm, together form a bottom member on the shell. The protective cover layer 6 covers the opposite face 7 of the disc 4, extends around the periphery 8 of the disc 4 and engages the undersurface 5 of the base 2 of the shell at the outermost portion 23 thereof and terminates in an outwardly inclined, frusto-conically shaped portion 22 engaging the exterior of the lowermost portion 21 of the side walls 3. The disc 4, protective cover layer 6 and shell 1 are secured together preferably by solder or brazing material which may be located between the engaging surfaces of components 2, 4, 6 and 21. A cavity 10 occupied by solder may be defined between the protective cover layer 6, the uppermost portion of the periphery 8 of the disc and the undersurface 5 of the base of the shell.
Figs. 5 and 6 illustrate a third embodiment of the cooking vessel of the invention. The stainless steel shell 1 is similar to that described with reference to Figs. 3 and 4 in that the lowermost portion 21 of the side walls 3 has a frusto-conical shape that inclines outwardly from the periphery of the base 2. The bottom member attached to the shell comprises a disc 4 or oxidisable ferrous metal and a protective cover layer 6 having a thickness of at most 1.5 mm. preferably about 0.5 mm.
The disc 4 has a diameter almost as great as that of the base 2 of the stainless steel shell 1. One face of the disc 4 engages the undersurface 5 of the base 2 of the shell 1. The opposite face 7 of the disc 4 engages a substantially planar portion of the protective cover layer 6. The protective cover layer 6 also has a frusto-conically shaped, outwardly inclining portion 23 that extends from the said substantially planar portion of the protective cover layer 6. The portion 23 of the protective cover layer 6 engages the inclined lowermost portion 21 of the side walls 3 of the shell 1. A space 24 between the shell 1, the periphery 8 of the disc 4 and the inclined portion 23 of the protective cover layer 6 is occupied by solder or brazing material.
A method of making the bottom member for the stainless steel shell will now be described with reference to Figs. 7 and 8. Fig. 7 shows the position of an edge portion of the disc 4 of oxidisable ferrous metal, the associated portion of the protective cover layer material 6 and the shaping equipment at the start of the shaping operation. Fig. 8 shows the position at the end of the shaping operation.
A stationary disc-shaped support block 20 having essentially the same diameter as that of the disc 4 of oxidisable ferrous metal is located withing the interior of a moveable annular block 1 9 when the latter is in its lowermost position (shown in Fig. 8). The diameter of the interior of the annular block 1 9 is a little greater that that of the discshaped support block 20. When the moveable annular block 1 9 is in its lowermost position its upper surface 1 6 lies in the same plane as the upper surface 1 5 of the disc-shaped block 20.The annular block 19 is spring-biased so that, unless pressure is applied to the upper surface 1 6 thereof, the moveable annular block 1 9 is located in an upper position (shown in Fig. 7). In this upper position a recess is defined by a portion of the interior of the annular block 1 9 and the upper surface 1 5 of the disc-shaped support block. The disc 4 of oxidisable ferrous metal is located in this recess so that one face (the lower face) of the disc 4 is supported by the upper surface 1 5 of the disc-shaped support block. The other face (the upper face) of the disc 4 lies a little above the plane of surface 16 in Fig. 7.
A circular sheet 6 of protective cover layer material such as copper having a thickness of at most 1.5 mm. has an inner portion 11 and an outer portion 9. The lower face of the inner portion 11 of the circular sheet 6 is applied to the upper surface of the disc 4. If desired, solder may be interposed between the disc 4 and the inner portion 11 of the circular sheet 6. Alternatively solder may be applied after the shaping operation. The outer portion 9 of the circular sheet 6 extends beyond the periphery of the disc 4 above surface 1 6. The circular sheet 6 is centred by means of location pins 1 2 that engage recesses in the annular block 1 9 and project upwardly from the upper surface 1 6 thereof.
A pressure pad 1 3 is applied to the upper surface of the inner portion 11 of the circular sheet 6. An annular die block 14 engages the upper face of the outer portion 9 of the circular sheet 6. The portion of the die block 1 4 nearest to the inner portion 11 of the circular sheet 6 has a profiled edge 1 7.
In order to carry out the shaping operation, pressure is applied to the upper surface of the circular sheet 6 whereby the die block 14, location pins 1 2 and annular block 1 9 all move downwardly thereby forming the outer portion of the circular sheet around the periphery of the disc 4. The shaping operation is completed when the downward movement is such that the annular block 1 9 is located in its lowermost position (as shown in Fig. 8). At this stage an inner portion 1 8 of the upper surface 1 6 of the annular block 1 9 engages the lowermost portion of the outer portion 9 of the sheet 6 and lies in the same plane as the surface 1 5 supporting the lower face of the disc 4.Accordingly the protective cover layer 6 is so shaped that its lowermost portion is in the same plane as the lower face of the disc 4. This coplanar character facilitates fitting of the bottom member comprising the disc 4 and the shaped cover layer 6 to the planar undersurface of the base of a stainless steel shell.
It will be apparent to the skilled reader that various modifications of the process described with reference to Figs. 7 and 8 are possible. If desired, the disc of oxidisable ferrous metal may be applied to the upper side of the sheet of protective cover layer material and the outer portion thereof may be formed upwardly around the periphery of the disc of oxidisable ferrous metal. The diameter of the sheet of protective cover layer material may vary. The diameter may be appropriate for any predetermined area of engagement of the protective cover layer to the underface of the base of the shell in the finished cooking vessel. The cooking vessel illustrated in Figs. 1 and 2 may be made in this way.Alternatively one may use a sheet of protective cover layer material of greater diameter and the excess may be trimmed off after the bottom member has been secured to the stainless steel shell. Alternatively one may use a sheet of protective cover layer material of greater diameter and carry out a supplementary shaping step after that described with reference to Figs. 7 and 8 so that the outermost portion of the protective cover layer is adapted to engage the lowermost portion of the upstanding side walls of the shell. The vessel described with reference to Figs. 3 and 4 may be made in this way.
Where the protective cover layer does not engage the undersurface of the base of the shell of the cooking vessel, for instance, as in
Figs. 5 and 6, it will be apparent that the shaping operation described with reference to
Figs. 7 and 8 is inappropriate. In this case the vessel is preferably made by attaching the disc of oxidisable ferrous metal to the stainless steel shell and an inner portion of the sheet of protective cover layer material, shaping the outer portion of the protective cover layer material to engage a lower portion of the side walls and attaching engaging portions of the cover layer material and side walls. Alternatively the vessel shown in Figs. 5 and 6 may be made by shaping a sheet of protective cover layer material using a punch including the layer of oxidisable ferrous metal and subsequent attachment of the components of the vessel together.
Where the protective cover layer is to engage the undersurface of the base of the shell, the use of the process illustrated by reference to Figs. 7 and 8 has the advantage of giving the accuracy of fit needed for producing a sound joint. One of the problems in obtaining a satisfactory joint is to ensure that the surfaces are held in intimate contact. If a separate copper pressing were made and brazed, together with the mild steel disc, to the underface of the base of the stainless steel shell, the commercial tolerances on the material thicknesses and the manufacturing tolerances of the diameter and depth of the copper pressing would increase the production difficulties. However such variations are reduced or eliminated by using the mild steel disc as a punch and forming the copper pressing around it preferably complete with solder materials at the interface.Thus the composite preformed bottom member is self-compensating for all thickness variations and, for practi cal purposes, is much the same for brazing as a single material, single thickness disc.
Other advantages that may be secured by the invention will be apparent.
An aesthetically pleasing appearance, an important consideration in the field of stainless steel cookware, may be maintained because the finished cooking vessel may have the outward appearance of stainless steel with a thick copper base. Because the layer of oxidisable ferrous metal is enclosed, it is concealed from the view of the user of the cooking vessel.
Because mild steel is liable to rust, the prevention of corrosion has limited its application in cookware in the past, particularly because of the high cost of protective treatments. Such expensive protective treatments are not needed in the invention where corrosion can be prevented in a reasonably economic manner.
Mild steel and other oxidisable ferrous metals are relatively cheap in relation to stainless steel. Thus the mild steel may be used in a relatively large mass and, as a result, the layer of mild steel provides a very effective means for diffusing heat provided from the heat source through the protective cover layer to prevent or reduce hot spots on the interior base of the vessel during use.
Because the major component of the thickness of the bottom member, the oxidisable ferrous metal such as mild steel, is a relatively inexpensive material, the invention enables the achievement of a greater weight addition per unit cost than in conventional stainless steel cookware. Moreover the addition of the oxidisable ferrous metal to the bottom of the cooking vessel also places the additional material where it can best contribute to the physical stability and balance of the cooking vessel.
Claims (16)
1. A cooking vessel comprising (a) a stainless steel shell having a base and upstanding side walls; and (b) a bottom member secured to the said shell, the bottom member comprising (i) a layer of oxidisable ferrous metal that covers a least a portion of the undersurface of the base of the shell and (ii) a protective cover layer enclosing the otherwise exposed surfaces of the layer of oxidisable ferrous metal by being attached to the base of the shell or a lower portion of the side walls of the shell; the thickness of the protective cover layer being at most 1.5 mm.
2. A cooking vessel as claimed in claim 1, wherein the thickness of the stainless steel shell is within the range of 0.3 mm to 2.5 mm.
3. A cooking vessel as claimed in claim 1 or 2, wherein the thickness of the layer of oxidisable ferrous metal on the undersurface of the base of the shell is within the range of 0.5 mm to 6 mm.
4. A cooking vessel as claimed in claim 3 wherein the thickness of the layer of oxidisable ferrous metal is within the range of 1 mm to 4 mm.
5. A cooking vessel as claimed in any one of claims 1 to 4, wherein the thickness of the protective cover layer is within the range of 0.2 mm to 1 mm.
6. A cooking vessel as claimed in any one of claims 1 to 5 wherein the thickness of the protective cover layer is within the range of 0.4 mm to 0.6 mm.
7. A cooking vessel as claimed in any one of claims 1 to 6, wherein the oxidisable ferrous metal is mild steel.
8. A cooking vessel as claimed in any one of claims 1 to 7 wherein the protective cover layer is made of a metal.
9. A cooking vessel as claimed in claim 8, wherein the metal is copper.
10. A cooking vessel as claimed in any one of claims 1 to 9, wherein the protective cover layer has been made by shaping protective cover layer material around a portion of the surface of the layer of oxidisable ferrous metal.
11. A cooking vessel as claimed in any one of claims 1 to 10, wherein the layer of oxidisable ferrous metal consists of a plate on the undersurface of the base of the shell.
1 2. A cooking vessel as claimed in any one of claims 1 to 11, wherein a bead of solder extending around the periphery of the layer of oxidisable ferrous metal contacts the protective cover layer and the base of the stainless steel shell.
1 3. A cooking vessel as claimed in claim 1 substantially as described herein with reference to Figs. 1 and 2; 3 and 4; or 5 and 6 of the accompanying drawings.
1 4. A process for making a cooking vessel comprising (i) a stainless steel shell having a base and upstanding side walls; and (ii) a bottom member comprising a layer of oxidisable ferrous metal that covers a portion of the undersurface of the base of the shell and a protective cover layer enclosing the otherwise exposed surfaces of the layer oxidisable ferrous metal by being attached to the undersurface of the base of the shell and, if desired, a portion of the protective cover layer may also be attached to a lower portion of the upstanding side walls of the shell; which process comprises (a) applying a layer of oxidisable ferrous metal having first and second opposite faces to protective cover layer material having a thickness of at most
1.5 mm; the protective cover layer material having inner and outer portions such that the inner portion is applied to the first face of the layer of oxidisable ferrous metal and the outer portion extends beyond the periphery of the layer of oxidisable ferrous metal; (b) applying pressure to the protective cover layer material so as to form the outer portion thereof around the periphery of the layer of oxidisable ferrous metal until the outer portion of the protective cover layer material reaches the plane of the second face of the oxidisable ferrous metal whereby the surfaces lying in the said plane are adapted to be secured to the undersurface of the base of the stainless steel shell and, if desired, a part of the outer portion of the protective cover layer material may be subjected to further shaping whereby the said part is adapted to be secured to a lower portion of the upstanding side walls of the shell; and (c) securing the layer of oxidisable ferrous metal and the protective cover layer material to the shell so as to provide the aforesaid bottom member attached to the shell.
1 5. A process as claimed in claim 14, carried out substantially as described herein with reference to Figs. 7 and 8 of the accompanying drawings.
16. A cooking vessel whenever made by a process as claimed in claim 14 or 1 5.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8217021 | 1982-06-11 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8315319D0 GB8315319D0 (en) | 1983-07-06 |
| GB2121674A true GB2121674A (en) | 1984-01-04 |
| GB2121674B GB2121674B (en) | 1986-05-14 |
Family
ID=10530976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08315319A Expired GB2121674B (en) | 1982-06-11 | 1983-06-06 | Stainless steel cookware |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2121674B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988003379A1 (en) * | 1986-11-15 | 1988-05-19 | Heinrich Berndes Gmbh | Metal cooking, baking or frying vessel |
| EP0411235A2 (en) * | 1989-07-31 | 1991-02-06 | N.V. Nameta | Cooking vessel for the use on induction cooking plates |
| GB2241873A (en) * | 1990-03-15 | 1991-09-18 | Chingchy Lii | A cooking device having heat energy regulator |
| EP1348362A1 (en) * | 2002-03-27 | 2003-10-01 | Philip Zepter | High-functionality bowl structure |
| US7150279B2 (en) * | 2004-06-30 | 2006-12-19 | Meyer Intellectual Properties Limited | Cooking vessel with multiply ringed bottom surface |
| WO2013049946A1 (en) * | 2011-10-03 | 2013-04-11 | Condeco Gmbh | Induction-compatible cookware with a low noise level and increased emc |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB583075A (en) * | 1944-07-13 | 1946-12-06 | Angelo Carmelo Scavullo | Improvements in and relating to cooking utensils and method of making same |
| GB1329979A (en) * | 1970-01-15 | 1973-09-12 | Racz Ns | Laminated cookware |
| GB1424924A (en) * | 1973-11-12 | 1976-02-11 | Racz Ns | Cookware unit |
| GB1451229A (en) * | 1973-01-24 | 1976-09-29 | Racz N S | Cooking utensil of laminate form |
| GB1488984A (en) * | 1975-10-29 | 1977-10-19 | Clad Metals Inc | Laminated metal products and methods of making the same |
| GB2014037A (en) * | 1978-01-26 | 1979-08-22 | Amc Int Alfa Metalcraft Corp | Cooking vessels |
| GB2034173A (en) * | 1978-09-29 | 1980-06-04 | Ardal Og Sunndal Verk | Cooking utensils |
-
1983
- 1983-06-06 GB GB08315319A patent/GB2121674B/en not_active Expired
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB583075A (en) * | 1944-07-13 | 1946-12-06 | Angelo Carmelo Scavullo | Improvements in and relating to cooking utensils and method of making same |
| GB1329979A (en) * | 1970-01-15 | 1973-09-12 | Racz Ns | Laminated cookware |
| GB1451229A (en) * | 1973-01-24 | 1976-09-29 | Racz N S | Cooking utensil of laminate form |
| GB1424924A (en) * | 1973-11-12 | 1976-02-11 | Racz Ns | Cookware unit |
| GB1488984A (en) * | 1975-10-29 | 1977-10-19 | Clad Metals Inc | Laminated metal products and methods of making the same |
| GB2014037A (en) * | 1978-01-26 | 1979-08-22 | Amc Int Alfa Metalcraft Corp | Cooking vessels |
| GB2034173A (en) * | 1978-09-29 | 1980-06-04 | Ardal Og Sunndal Verk | Cooking utensils |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988003379A1 (en) * | 1986-11-15 | 1988-05-19 | Heinrich Berndes Gmbh | Metal cooking, baking or frying vessel |
| EP0411235A2 (en) * | 1989-07-31 | 1991-02-06 | N.V. Nameta | Cooking vessel for the use on induction cooking plates |
| EP0411235A3 (en) * | 1989-07-31 | 1991-10-09 | N.V. Nameta | Cooking vessel for the use on induction cooking plates |
| GB2241873A (en) * | 1990-03-15 | 1991-09-18 | Chingchy Lii | A cooking device having heat energy regulator |
| EP1348362A1 (en) * | 2002-03-27 | 2003-10-01 | Philip Zepter | High-functionality bowl structure |
| US7086552B2 (en) | 2002-03-27 | 2006-08-08 | Philip Zepter | High-functionality bowl structure |
| US7150279B2 (en) * | 2004-06-30 | 2006-12-19 | Meyer Intellectual Properties Limited | Cooking vessel with multiply ringed bottom surface |
| WO2013049946A1 (en) * | 2011-10-03 | 2013-04-11 | Condeco Gmbh | Induction-compatible cookware with a low noise level and increased emc |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8315319D0 (en) | 1983-07-06 |
| GB2121674B (en) | 1986-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4350259A (en) | Stainless steel container with thermoradiating bottom | |
| JPH0425059Y2 (en) | ||
| JP2991947B2 (en) | Pot-shaped cooking and boiling equipment | |
| US4596236A (en) | Stainless steel cooking vessel suitable for all types of heat sources | |
| US5497696A (en) | Cooking vessel with suppressed deformation of the bottom | |
| JPH0847450A (en) | Cooking instrument wherein heat energy is provided to bottom wall by heat conduction or electromagnetic induction | |
| JPS61170415A (en) | Cooking utensil | |
| RU2121901C1 (en) | Method for shaping stainless steel cooking dishware with decorated base and cooking dishware made by such method | |
| US5809630A (en) | Method of manufacturing a culinary vessel with reinforced bottom | |
| AU645211B2 (en) | A method of manufacturing a cooking utensil | |
| JP2916355B2 (en) | Cooker | |
| GB2121674A (en) | Stainless steel cookware | |
| US7150279B2 (en) | Cooking vessel with multiply ringed bottom surface | |
| KR930003578B1 (en) | Rolled beaded edge oil core frying pan | |
| US20050204928A1 (en) | Cooking utensil the covering of which comprise an ornamental piece and corresponding production method | |
| US3045664A (en) | Cooking pots | |
| US5881635A (en) | Enamelled cookware and method of manufacturing it | |
| AU644746B2 (en) | A method of manufacturing a cooking utensil | |
| HRP920404A2 (en) | Cooking pans of capsular base type with a profiled lateral band | |
| JP2002178071A (en) | Method for manufacturing cooking container | |
| JPS6232498Y2 (en) | ||
| JPS6132589Y2 (en) | ||
| KR102285491B1 (en) | Manufacturing Method for Induction Heating Cooker | |
| EP0162517B1 (en) | A method for obtaining a metal tableware article, in particular a plate or tray, with improved peripheral border, and article so obtained | |
| JP3008521U (en) | Cooking pot |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19970606 |