| 摘要 |
A printing process to be applied to the whole or any selected portion of the lower surface of a mat having carpet-engaging features substantially equally distributed over the whole of the lower surface. The application of a desired graphic pattern using a computer controlled ink jet that is spaced from the lower surface of the mat by a distance exceeding the height of the carpet-engaging features. The space between the computer controlled ink jet and the carpet engaging features is preferable sufficient to ensure that the carpet engaging features will have substantially all surfaces subjected to the ink delivered by the ink jet including the lower surface of the mat, and the lower and lateral surfaces of the carpet-engaging features. The ink can be reactive to radiation such as ultra-violet light to bond the ink to the mat lower surface and carpet-engaging features. At least the selected area of the mat lower surface can be pre-treated by plasma or another oxidizing medium to enhance the acceptance of the ink jet spray.
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