| 摘要 |
The present invention relates to a method and apparatus for making display boxes having windows made of substantially rigid plastic material. The boxes comprise substantially rigid opaque material, such as paperboard, in combination with substantially rigid plastic material. The substantially rigid plastic material includes at least one fold line or groove which cooperates with a fold line in the opaque material when the box is set up. The present invention provides a method and means for making such boxes in a single machine from a supply of blanks of the opaque material and a roll of ungrooved plastic material. The machine comprises means for feeding of the opaque blanks, feeding of a length of the plastic material, means for forming at least one groove in the length of plastic material, means for cutting the grooved plastic material into sheets, and means for juxtaposing and joining the blanks of opaque material and the cut plastic sheets of material.
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