Method of making perforated adhesive tapes

• US 3,183,116 A
• Filed: 10/16/1962
• Issued: 05/11/1965
• Est. Priority Date: 03/14/1960
• Status: Expired due to Term

• Current Assignee: Charles H. Schaar
• Original Assignee: Charles H. Schaar
• Inventors: Schaar, Charles H.
• Application Number:
  US04/230,831
• Time in Patent Office: 938 Days
• US Class Current: 427/208.6
• CPC Class Codes: A61F 13/0206 with absorbent fibrous layers, e.g. woven or non-woven absorbent pads or island dressings
• CPC Class Codes: A61F 13/0226 characterised by the support layer
• CPC Class Codes: A61F 13/0256 characterized by the parametric properties of the adhesive
• CPC Class Codes: A61F 13/0283 for making adhesive or cohesive tape or fabrics therefor, e.g. coating or mechanical treatments
• CPC Class Codes: C09J 2301/18 characterized by perforations in the adhesive tape
• CPC Class Codes: C09J 7/26 Porous or cellular plastics
• CPC Class Codes: Y10T 156/1059 Splitting sheet lamina in plane intermediate of faces
• CPC Class Codes: Y10T 428/14 Layer or component removable to expose adhesive

Claims

1. A METHOD OF FORMING A COATING OF A PRESSURE-SENSITIVE ADHESIVE ON A TAPE BACKING HAVING OPENINGS THEREIN WITHOUT OBSTRUCTING SAID OPENINGS WITH AN ADHESIVE MEMBRANE BRIDGING SAID OPENINGS, COMPRISING THE STEPS OF:

(A) COATING A SUPPORTING SURFACE WITH A LAYER OF A PRESSURE-SENSITIVE ADHESIVE, THE COHESIVE STRENGTH OF WHICH IS TEMPORARILY REDUCED TO THE EXTENT THAT THE ADHESIVE LAYER CAN BE EASILY SPLIT;

(B) APPLYING SAID TAPE BACKING ON THE SURFACE OF SAID ADHESIVE LAYER UNDER PRESSURE INSUFFICIENT TO PRESS SAID BACKING INTO SAID LAYER, BUT SUFFICIENT TO MAINTAIN THE BACKING IN ADHESIVE CONTACT WITH THE SURFACE OF SAID ADHESIVE LAYER;

AND (C) SEPARATING SAID BACKING FROM THE COHESIVELY WEAK ADHESIVE LAYER AT AN ANGLE THERETO TO TRANSFER A THIN COATING SPLIT FROM THE ADHESIVE LAYER TO THE PORTIONS OF THE BACKING IN CONTACT WITH THE ADHESIVE.