| 摘要 |
A method of forming a matrix assembly for use in forming creases or score lines in card-like material. The method comprises providing a steel strip, treating an upper surface of the steel strip with a resin adhesive, extruding one or more plastic material strips onto the metal strip to define a longitudinal channel and heating the assembly so formed to cure the resin adhesive and adhere the plastic material to the metal strip. The present method obviates the need to perforate the metal strip and therefore a thinner steel strip is obtained.
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