Freezing of material into blocks

• US 6,012,293 A
• Filed: 06/18/1998
• Issued: 01/11/2000
• Est. Priority Date: 12/21/1995
• Status: Expired due to Fees

• Current Assignee: Nestec SA (Nestle SA)
• Original Assignee: Nestec SA (Nestle SA)
• Inventors: Andersson, Bo
• Primary Examiner(s): Tapolcai, William E.
• Application Number:
  US09/091,689
• Time in Patent Office: 572 Days
• Field of Search: 62/72, 62/345
• US Class Current: 62/72
• CPC Class Codes: A23G 3/0273 Moulds of plastic or elastomeric material, or plastic or elastomer coated moulds
• CPC Class Codes: A23L 3/362 with packages or with shaping in form of blocks or portions

Abstract

The present invention relates to a method and an apparatus for freezing of material into fully or partially frozen blocks. The apparatus includes a refrigeration panel and a sheet or belt which is passed along the refrigeration panel. The apparatus includes at least one flexible, material receiving mold having at least one open compartment, where the sheet or belt provides a base for the compartment. The compartment is conveyed along the refrigerating panel to freeze the material, and then is subject to bending and/or twisting forces release the block(s) from the compartment.

Claims

1. An apparatus for freezing material into blocks comprising:

cooling means that includes a refrigeration panel for freezing the material;

at least one material receiving mold comprising a sheet or belt that acts as a base and at least one open compartment that has top and bottom openings, the mold being sufficiently resilient to withstand bending or twisting forces;

means for conveying the mold past the refrigeration panel for freezing at least a portion of the material in the mold as it moves over the refrigeration panel; and

bending means to bend the mold to release the block from the compartment.

2. The apparatus of claim 1, wherein the conveying means comprises a molding conveyor which defines the mold or molds.

3. The apparatus of claim 1, further comprising twisting means to twist the mold or molds to assist in releasing blocks therefrom.

4. The apparatus of claim 1, wherein the conveying means is endless.

5. The apparatus of claim 3, wherein the bending means provides bending and/or the twisting means provides twisting of the mold after the mold has moved past the refrigeration panel.

6. The apparatus of claim 3, wherein the bending means provides a bending and/or the twisting means provides a twisting of the mold conveyor as the mold moves over the refrigeration panel.

7. The apparatus of claim 1, wherein the mold conveyor is made of plastic or rubber.

8. The apparatus of claim 1, further comprising emptying means for ejecting the blocks from the at least one compartment.

9. The apparatus of claim 1, further comprising convection freezing means for further cooling of the material.

10. The apparatus of claim 1, wherein the cooling means utilizes nitrogen and a steel belt acts as the base of the compartments.

16. The apparatus of claim 1 wherein the conveying means comprises a first endless belt and the bending means comprises a first roller over which the first endless belt passes to change direction and thus release the block.

17. The apparatus of claim 16 wherein the at least one mold comprises a second endless belt which includes a plurality of compartment sidewalls, wherein the first and second endless belts more synchronously to simultaneously convey the compartments past the refrigeration panel, and wherein the bending means comprises a second roller over which the second endless belt passes to change direction to assist in releasing the block.

11. A method for freezing material into blocks comprising the steps of:

depositing the material into at least one open compartment of a mold having top and bottom openings, the mold positioned upon a supporting sheet or belt which acts as a base of the compartment(s);

conveying the material and mold along the refrigerator panel while the sheet or belt is moved over the refrigeration panel to freeze the material into blocks, and bending the mold to release the block(s) from the compartment(s).

12. A method for freezing a material into blocks comprising the steps of:

depositing the material into a plurality of compartments, wherein the compartments comprise a first endless belt which defines a base of the compartments and a second endless belt which defines sides of the compartments;

moving the first and second endless belts along a path while freezing the material inside the compartments into blocks; and

releasing the blocks from the compartments by separating the first and second endless belts.

13. The method of claim 12 which further comprises providing cooling from beneath a portion of the first endless belt to freeze the material into the blocks.

14. The method of claim 12 wherein the first and second endless belts are separated by passing over rollers to move away from each other.

15. The method of claim 12 wherein the first and second endless belts are operated synchronously.

18. An apparatus for freezing a material into blocks comprising:

cooling means;

a sheet or belt;

moving means to pass the sheet or belt along the cooling means;

at least one flexible, material receiving mold comprising at least one upwards and downwards open compartment;

conveying means to convey the mold along the cooling means on top of the sheet or belt that acts as a base for the open compartment(s) while they contain the material; and

bending means to bend the molds to release the frozen blocks formed in the compartment(s).