Laser marking of molded hand grips

• US 5,239,158 A
• Filed: 04/15/1992
• Issued: 08/24/1993
• Est. Priority Date: 04/15/1992
• Status: Expired due to Fees

• Current Assignee: Eaton Corp. (Wisconsin) (Eaton Corporation PLC.)
• Original Assignee: Eaton Corp. (Wisconsin) (Eaton Corporation PLC.)
• Inventors: Locklear, Tony, Wyckoff, Dennis C.
• Primary Examiner(s): ALBRITTON, CLARENCE
• Application Number:
  US07/868,807
• Time in Patent Office: 496 Days
• Field of Search: 219/121.68, 219/121.69, 219/121.65, 219/121.66, 346/76 L, 273/77 R
• US Class Current: 219/121.69
• CPC Class Codes: B23K 2103/42 Plastics B23K2103/16 takes precedence
• CPC Class Codes: B23K 2103/50 Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
• CPC Class Codes: B41M 5/24 Ablative recording, e.g. by burning marks; Spark recording marking by high energetic means, e.g. by laser otherwise than burning or ablative removal B41M5/26; materials or methods for recording or reproduction by optical means G11B7/00
• CPC Class Codes: B44B 7/005 by multi-step processes
• CPC Class Codes: B44C 1/228 by laser radiation

Abstract

A method is provided for marking a molded hand grip such as a golf grip (100) with specialized information such as a personalized signature. The method utilizes a laser marking device (50) that is operative to provide an optical beam (8) having power and optical wave length characteristics effective to vaporize a continuous groove or trench and/or adjacently positioned dots in a target region ("R") on the hand grip to which beam (8) is exposed. The marked grip is then removed from device (50) and a selected colorant (16) such as paint or ink of desired color is then deposited in the marking that is preferably bondable to the desired extent to the material from which the hand grip is molded after which any excess colorant is then removed to provide the finished hand grip having the specialized information marked thereon.

Claims

1. A method for marking selected information on a molded hand grip, said method including the steps of;

providing a hand grip molded from a selected laser vaporizable material and having a region thereon to be marked,

providing a laser marking device operative to provide an optical beam having power and optical wave length characteristics effective to vaporize the selected material in a marking form having the breadth and depth desired and having means for receiving the information to be marked and for causing the optical beam to mark said region in the marking form desired upon activation of the optical beam in response to a command signal,

exposing the hand grip region to the optical beam,

initiating the command signal and marking the information on the hand grip region exposed thereto,

removing the laser marked hand grip from the laser marking device,

depositing a selected colorant into the laser marking, and

removing any excess of said colorant from the surface of the hand grip region having the laser marking thereon.

2. The method of claim 1 wherein the laser device is a neodymium yttrium aluminum garnet (NR:

YAG) marking device.

3. The method of claim 1 wherein the laser device is a CO₂ marking device.

4. The method of claim 1 wherein the optical beam traverses across the region to mark the selected information thereon.

5. The method of claim 1 further including the step of placing a mask between the optical beam and the region to be marked that is operative to cast an image of the information to be marked thereon and then marking the region beneath the image with the optical beam.

6. The method of claim 1 wherein the marking form is adjacently positioned dots.

7. The method of claim 1 wherein the marking form is a continuous groove.

8. The method of claim 1 wherein the marking form is a combination of a continuous groove and adjacently positioned dots.

9. The method of claim 1 wherein the material is selected from the group consisting of thermoplastic elastomer and rubber materials.

10. The method of claim 1 wherein the hand grip is a golf hand grip.