초록 ▼

A process for manufacturing a vacuum insulated stainless steel coffee server, which includes the steps of welding an outer shell (32) to an inner liner (34) then placing a ceramic ring (38) in a vacuum base (40) and slipping the vacuum base on the shell with the spacer forming a welding gap therebet

A process for manufacturing a vacuum insulated stainless steel coffee server, which includes the steps of welding an outer shell (32) to an inner liner (34) then placing a ceramic ring (38) in a vacuum base (40) and slipping the vacuum base on the shell with the spacer forming a welding gap therebetween. The next step is welding the vacuum base to the shell at the welding gap formed by the ring and applying brazing powder and flux around a hole (36) in the liner, followed by inserting a threaded coupling (48) through the hole and a mating bore (42) in the base, with a first nut (52) on the coupling acting as a shoulder. The next step is applying brazing powder and flux around the nut and the bore in the vacuum base and then positioning the coffee server in a vacuum furnace and evacuating, while simultaneously elevating the temperature joining the coupling to the contiguous structure. The final step is removing the coffee server from the furnace and nesting a cup shaped outer base (54) over the shell and positioning a handle (58) onto the threaded coupling and attaching with a second internally threaded nut (60).

대표청구항 ▼

1. A process for manufacturing a vacuum insulated coffee server comprising the steps of:a) assembling a coffee server outer shell to a coffee server inner liner, said inner liner having a hole in its lower side, b) welding the outer shell to the inner liner circumferencially at the shell's and liner

1. A process for manufacturing a vacuum insulated coffee server comprising the steps of:a) assembling a coffee server outer shell to a coffee server inner liner, said inner liner having a hole in its lower side, b) welding the outer shell to the inner liner circumferencially at the shell's and liner's distal top interface, c) placing a flat ceramic ring in a cup shaped vacuum base, said vacuum base having a bore in its lower side, further, positioning the ring in essentially the vacuum base's center, slipping the vacuum base over the inner liner while aligning the bore with the hole, such that the ring contiguously engages both the inner liner and the vacuum base acting as a spacer forming a welding gap therebetween, d) welding the vacuum base to the outer shell circumferencially at the welding gap formed by the ring, e) applying a mixed compound of brazing powder and flux around the hole in the inner liner, f) inserting a hollow stepped threaded coupling through the aligned bore and hole until the coupling's distal end is flush with the inner liner inside surface and contiguously engages the mixed compound, g) threading a first internally threaded nut onto the threaded coupling and tightening until it is flush with the vacuum base outside surface, h) applying a mixed compound of brazing powder and flux around the first nut and bore in the vacuum base, i) positioning the coffee server in a vacuum furnace and evacuating the furnace to a level below atmospheric pressure, j) elevating ambient temperature within the vacuum furnace until coalescence is achieved with the mixed compound permanently joining coupling to the inner liner and the first nut to both the vacuum base and the coupling in a hermetically sealed manner, k) removing the coffee server from the furnace and nesting a cup shaped outer base, having a clearance aperture in its vertical side, over a lower portion of the outer shell while aligning the threaded coupling through the aperture permitting the coupling to extend outwardly, l) positioning a handle onto the threaded coupling contiguously engaging the outer base, and m) threading a second internally threaded nut onto the threaded coupling and tightening the second nut until it is flush with the outer base exterior surface securing the handle to the coffee server.