Plastics sterilizer and melter having an afterburner

• US 3,958,936 A
• Filed: 07/02/1975
• Issued: 05/25/1976
• Est. Priority Date: 07/02/1975
• Status: Expired due to Term

• Current Assignee: Raytheon Company (Rtx Corporation)
• Original Assignee: Raytheon Company (Rtx Corporation)
• Inventors: Knight, Philip A. Jr.
• Primary Examiner(s): Wolk, Morris O.
• Assistant Examiner(s): Garris, Bradley R.
• Application Number:
  US05/592,429
• Time in Patent Office: 328 Days
• Field of Search: 21/93, 21/102 R, 21/2, 21/103, 21/54 R, 23/277 C, 23/277 R, 432/156, 432/158, 219/420, 219/421, 219/424, 219/423, 13/6, 13/20
• US Class Current: 422/243
• CPC Class Codes: A61L 2/04 Heat A61L2/08 takes precedence

Abstract

An appliance for sterilizing and melting plastic items such as found in hospitals or the like, for example, which appliance includes a chamber containing a foil casing within which the items are placed, and means for heating the chamber for a temperature and time cycle sufficient to soften or melt the plastic items which when cooled will form a solid body of plastic material containing within it other non-melted disposable items such as might have been included with the plastic items.

Claims

1. A furnace for melting and sterilizing plastic items comprising a first housing, a melting chamber within a portion of the first housing, an air circulation system within the first housing comprising a first air circulation chamber on one side of the melting chamber and communicating therewith, a heating element, a second air circulation chamber on the opposite side of the melting chamber and communicating therewith, and blower means connected with both said air circulation chambers for directing air into the first thereof, and consecutively through the heating element and through the melting chamber and through the second air circulation chamber, and afterburner means located outside of the first housing comprising a second housing connected with said air circulation system, heating means within said second housing, and second blower means for drawing some of the air from one of said air circulation chambers through the heating means.

2. A furnace for melting and sterilizing plastic items comprising a first housing, a melting chamber within a portion of the first housing, a first air circulation chamber within the first housing on one side of the melting chamber and having an inlet port communicating with the interior of the melting chamber, a heating element within said first air circulation chamber, a second air circulation chamber within the first housing on the opposite side of the melting chamber and having an outlet port communicating with the interior of the melting chamber, first blower means within the first housing connected with both said air circulation chambers for directing air into the first thereof, through the heating element and into the melting chamber and for simultaneously drawing air out of the melting chamber through the second air circulation chamber, and afterburner means located outside of the first housing comprising a second housing connected with one of said air circulation chambers, second heating means within said second housing, and second blower means for drawing some of the air from one of said air circulation chambers through the second housing and the second heating means thereof.

3. A furnace as set forth in claim 2 wherein said first blower means is connected to said first air circulation chamber to blow air thereinto and to said second air circulation chamber to suction air therefrom, and the second housing is connected to said first air circulation chamber.

4. A furnace as set forth in claim 3 wherein said second housing is connected to said first air circulation chamber at approximately the area of most positive air pressure.

5. A furnace as set forth in claim 3 wherein said second housing includes a first compartment which is connected to said first air circulation chamber, and a second compartment within said first compartment and connected to said second blower means, and wherein said second heating means is located within said second compartment.

6. A furnace as set forth in claim 3 wherein diluter means is located between said second housing and said second blower means and has an opening communicating with the atmosphere external to said furnace whereby cool air is mixed with heated air being drawn from the second housing by the second blower means.

7. A furnace as set forth in claim 2 wherein disposable container means is positioned within the melting chamber for receiving plastic items to be melted, said container means being removable from the melting chamber, whereby after the plastic items have been melted and resolidified, said container means is removed for disposal together with the resolidified plastics therein.

8. A furnace as set forth in claim 7 wherein said container means is a metal foil container.