Method of making a paint applicator

• US 5,855,715 A
• Filed: 07/10/1992
• Issued: 01/05/1999
• Est. Priority Date: 02/20/1990
• Status: Expired due to Fees

• Current Assignee: 3M Company
• Original Assignee: 3M Company
• Inventors: Bishop, Daniel H., Langford, Nathaniel P.
• Primary Examiner(s): MAYES, MELVIN C
• Application Number:
  US07/911,729
• Time in Patent Office: 2,370 Days
• Field of Search: 156/195, 156/251, 156/188, 156/191, 156/187, 156/257, 156/250, 156/268, 156/279, 29/120, 29/110, 29/132, 428/36.4, 428/36.5, 428/359, 428/360, 428/361, 428/375, 428/376, 428/377, 428/313.3, 428/301, 428/317.9, 428/298, 428/299, 427/189, 427/196, 427/200, 427/206, 427/375, 15/210.1, 15/230.11, 15/230.12, 15/230.13, 15/244.3
• US Class Current: 156/187
• CPC Class Codes: B05C 17/0207 characterised by the cover, e.g. cover material or structure, special surface for producing patterns B05C17/0212, B05C17/0352 take precedence
• CPC Class Codes: Y10T 156/1052 with cutting, punching, tearing or severing
• CPC Class Codes: Y10T 156/1064 Partial cutting [e.g., grooving or incising]
• CPC Class Codes: Y10T 156/1082 Partial cutting bonded sandwich [e.g., grooving or incising]

Abstract

A paint applicator has a paint-impervious backing such as a cylindrical core to which is adhered a resilient reticulated reservoir such as an open-cell polyurethane foam. Covering the reservoir is a flexible reticulated metering layer that is not bonded to the reservoir except at crossing points of the reticulations. The applicator better releases paint and is more easily cleaned as compared to prior paint applicators having pile fabric coverings. In addition to paint rolls, other types of paint applicators such as paint pads and paint mittens can employ the same composite of a reticulated reservoir and reticulated metering layer.

Claims

1. Method of making a paint applicator that can be mounted on a paint roller, said method comprising the sequential steps of:

a) continuously forming a cylindrical core of paint-impervious material,

b) spirally winding onto, and bonding to, the core an elongated strip of a resilient, reticulated reservoir,

c) forming on the exterior surface of the reservoir a flexible reticulated metering layer which has at least twice as many openings/cm as does the reservoir and a thickness less than one-half that of the reservoir,

d) bonding the metering layer to the underlying reservoir only at crossing points of the reticulations, and

e) cutting the resulting composite to individual roller lengths.

2. Method as defined in claim 1 wherein the bonding in step d) involves heating fibers at contacting surfaces of the reservoir and metering layers to render them sufficiently tacky to become bonded to each other on contact.

3. Method as defined in claim 1 and further comprising the additional step of fusing the ends of the metering layer to the core at the ends of each roller length to cover the axial edges of the reservoir.

4. Method of making paint applicators that can be mounted on paint rollers, said method comprising the steps of:

a) continuously forming from paint-impervious material a cylindrical core having an axis and a cylindrical peripheral surface,

b) spirally winding onto, and bonding to, the peripheral surface of the core an elongated strip of a resilient, reticulated reservoir,

c) notching the reservoir around the peripheral surface at positions spaced axially of the core to form roller lengths,

d) forming on the exterior surface of the notched reservoir a flexible reticulated metering layer which has at least twice as many openings per centimeter as does the reservoir and a thickness less than one-half that of the reservoir,

d) bonding the metering layer to the underlying reservoir only at crossing points of the reticulations,

e) fusing the metering layer to the peripheral surface of the core in the notches at the ends of the roller lengths to cover the axially spaced edges of the reservoir portion on each roller length, and

f) cutting the resulting composite between the roller lengths to form the paint applicators.