Water-absorbent pad

• US 8,628,561 B2
• Filed: 02/12/2010
• Issued: 01/14/2014
• Est. Priority Date: 04/15/2009
• Status: Expired due to Fees

• Current Assignee: Ishizaki-Shizai Co., Ltd.
• Original Assignee: Ishizaki-Shizai Co., Ltd.
• Inventors: Ishizaki, Shingo
• Primary Examiner(s): Dvorak, Linda
• Assistant Examiner(s): SMITH, KAITLYN ELIZABETH
• Application Number:
  US13/263,186
• Publication Number:
  US 20120046720A1
• Time in Patent Office: 1,432 Days
• Field of Search: 607/114
• US Class Current: 607/114
• CPC Class Codes: A61F 2007/0002 Head or parts thereof
• CPC Class Codes: A61F 2007/0003 Face
• CPC Class Codes: A61F 2007/0009 Throat or neck
• CPC Class Codes: A61F 2007/0214 Polymers, e.g. water absorbing
• CPC Class Codes: A61F 2007/0242 heated by microwaves
• CPC Class Codes: A61F 2007/0257 with a fluid impermeable layer
• CPC Class Codes: A61F 2007/026 with a fluid absorbing layer
• CPC Class Codes: A61F 2007/108 Cold packs, i.e. devices to be cooled or frozen in refrigerator or freezing compartment
• CPC Class Codes: A61F 7/02 Compresses or poultices for effecting heating or cooling

Abstract

It is an object of the present invention to provide a water-absorbent pad that is made of impermeable cloth or sheet, that is capable of absorbing water when needed and that effectively cools and heats a human face, neck, head and the like. A cooling/heating water-absorbent pad, wherein a water-absorbent sheet made of a material containing water-absorbent polymer is inserted in a planate bag made of impermeable cloth having a closed periphery; the impermeable cloth and the water-absorbent sheet are stitched together such that the impermeable cloth and the water-absorbent sheet are divided into a plurality of areas in a planar view; and water is absorbed into the water-absorbent sheet through a channel formed at the stitched portion. In this moment, water is absorbed into the water-absorbent sheet only via holes made by the stitching and by a capillary action of a thread piercing through the water-absorbent sheet. The water-absorbent sheet is preferably made of non-woven cloth containing water-absorbent polymer. The impermeable cloth may have a water-repellent surface.

Claims

1. A cooling/heating water-absorbent pad, wherein:

a water-absorbent sheet made of a material containing water-absorbent polymer is inserted in a planate bag made of impermeable cloth or sheet having a closed periphery;

the impermeable cloth or sheet and the water-absorbent sheet are stitched together such that the impermeable cloth or sheet and the water-absorbent sheet are divided into a plurality of areas in a planar view; and

water is absorbed into the water-absorbent sheet only via holes made by the stitching and by a capillarity action of a thread piercing through the water-absorbent sheet.

2. A cooling/heating water-absorbent pad according to claim 1, wherein when the water-absorbent sheet absorbs water, which makes the divided areas swell, a portion at which the impermeable cloth or sheet and the water-absorbent sheet are stitched together becomes a dent and is hidden.

3. A cooling/heating water-absorbent pad according to claim 2, wherein the water-absorbent sheet is made of non-woven cloth containing water-absorbent polymer.

4. A cooling/heating water-absorbent pad according to claim 2, wherein the impermeable cloth or sheet has a water-repellent surface.

5. A cooling/heating water-absorbent pad according to claim 1, wherein the water-absorbent sheet is made of non-woven cloth containing water-absorbent polymer.

6. A cooling/heating water-absorbent pad according to claim 5, wherein the impermeable cloth or sheet has a water-repellent surface.

7. A cooling/heating water-absorbent pad according to claim 1, wherein the impermeable cloth or sheet has a water-repellent surface.