Cleaning sheet

• US 7,516,510 B2
• Filed: 08/08/2005
• Issued: 04/14/2009
• Est. Priority Date: 09/30/2004
• Status: Expired due to Fees

• Current Assignee: Unicharm Corporation
• Original Assignee: Unicharm Corporation
• Inventors: Tanaka, Yoshinori
• Primary Examiner(s): Spisich; Mark
• Application Number:
  US11/200,378
• Publication Number:
  US 20060064834A1
• Time in Patent Office: 1,345 Days
• Field of Search: 152/08, 152/091, 152/28, 442/328, 442/329, 442/381, 401137-140
• US Class Current: 15/228
• CPC Class Codes: A47L 13/20 Mops
• CPC Class Codes: Y10T 442/601 Nonwoven fabric has an elastic quality
• CPC Class Codes: Y10T 442/602 Nonwoven fabric comprises an elastic strand or fiber material
• CPC Class Codes: Y10T 442/659 Including an additional nonwoven fabric

Abstract

Disclosed is a cleaning sheet including a main body which is intended to be placed on a bottom face of a cleaning head and attachment sheets which extend from the main body and are intended to be secured on a top face of the cleaning head. The main body has an attachment surface and a cleaning surface on opposite sides. The attachment surface is intended to face the bottom face of the cleaning head. The main body includes a substrate sheet and a stretchable support sheet disposed on a cleaning surface side of the substrate sheet to have projections extending beyond opposite side edges of the substrate sheet. Each attachment sheet is joined to a respective projection of the support sheet.

Claims

1. A cleaning sheet comprising a main body which is intended to be placed on a bottom face of a cleaning head and attachment sheets which extend from the main body and are intended to be secured on a top face of the cleaning head,

the main body having an attachment surface and a cleaning surface on opposite sides, the attachment surface being intended to face the bottom face of the cleaning head, the main body including a substrate sheet and a stretchable support sheet disposed on a cleaning surface side of the substrate sheet to have projections extending beyond opposite side edges of the substrate sheet, each attachment sheet being joined to a respective projection of the support sheet.

2. The cleaning sheet of claim 1, wherein under an equal tensile stress, the support sheet has a higher elongation percentage than the substrate sheet and the attachment sheet.

3. The cleaning sheet of claim 1, wherein the support sheet has an elongation percentage of 10% or more when a tensile load of 2 N per 25 mm width is exerted for 30 seconds in a direction along which the projections project from the substrate sheet and a recovery percentage of 90% or more after 30 seconds after removal of the tensile load.

4. The cleaning sheet of claim 1, wherein each attachment sheet is joined at a proximal end to an attachment surface side of the support sheet in face-to-face relationship while having a distal end directed toward center of the main body.

5. The cleaning sheet of claim 1, wherein the attachment sheets are joined to the support sheet at locations spaced outward from the opposite side edges of the substrate sheet.

6. The cleaning sheet of claim 1, wherein the support sheet is joined to the cleaning surface side of the substrate sheet at locations spaced inward from the opposite side edges of the substrate sheet and is permitted to stretch outside the locations where the support sheet is joined to the substrate sheet.

7. The cleaning sheet of claim 1, wherein the support sheet is a through-air bonded nonwoven fabric.