A sheet pan that includes a baking surface with an upwardly-extending tension bow formed therein that provides structural reinforcement to the baking surface; a sidewall portion surrounding the entire baking surface and defines an interior surface of the sheet pan and an exterior surface of the sheet pan, wherein the sidewall portion further includes a structural reinforcement rib formed therein, wherein the topmost region of the sidewall portion is rolled downward and away from the baking surface to form a rim having both an outside portion that defines the outer edge of the sheet pan, and an inside portion, and wherein the inside portion of the rim abuts the sidewall portion on the exterior surface of the sheet pan, and a reinforcing wire surrounding the upper region of the sidewall portion, wherein the wire is completely enclosed by and sealed within the rim, and wherein any significant open volume between the wire and the rim has been eliminated.

A sheet pan that includes a baking surface with an upwardly-extending tension bow formed therein that provides structural reinforcement to the baking surface; a sidewall portion surrounding the entire baking surface and defines an interior surface of the sheet pan and an exterior surface of the sheet pan, wherein the sidewall portion further includes a structural reinforcement rib formed therein, wherein the topmost region of the sidewall portion is rolled downward and away from the baking surface to form a rim having both an outside portion that defines the outer edge of the sheet pan, and an inside portion, and wherein the inside portion of the rim abuts the sidewall portion on the exterior surface of the sheet pan, and a reinforcing wire surrounding the upper region of the sidewall portion, wherein the wire is completely enclosed by and sealed within the rim, and wherein any significant open volume between the wire and the rim has been eliminated.

A method of making a cold plate includes stacking three aluminum sheets on top of each other while each of the three aluminum sheets is generally flat. An edge of the three aluminum sheets are secured together. A top one of the aluminum sheets is welded to a middle one of the aluminum sheets at a plurality of first locations and a bottom one of the aluminum sheets is welded to the middle one of the aluminum sheets at a plurality of second locations different than the plurality of first locations. A pressurized medium is supplied between the top one of the aluminum sheets and the bottom one of the aluminum sheets to separate the top one of the aluminum sheets from the bottom one of the aluminum sheets and deform the middle one of the aluminum sheets.

A method of making a cold plate includes stacking three aluminum sheets on top of each other while each of the three aluminum sheets is generally flat. An edge of the three aluminum sheets are secured together. A top one of the aluminum sheets is welded to a middle one of the aluminum sheets at a plurality of first locations and a bottom one of the aluminum sheets is welded to the middle one of the aluminum sheets at a plurality of second locations different than the plurality of first locations. A pressurized medium is supplied between the top one of the aluminum sheets and the bottom one of the aluminum sheets to separate the top one of the aluminum sheets from the bottom one of the aluminum sheets and deform the middle one of the aluminum sheets.