초록 ▼

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

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 apparatus for making such boxes from a supply of sheets of the opaque material and a supply of sheets of the plastic material. The method comprises the steps of supplying a sheet of opaque material with an opening, positioning a supplied sheet of plastic material into juxtaposition with the sheet of opaque material to cover the opening, adhering the plastic material to the opaque material, and forming groove lines in the plastic and opaque sheets to permit folding of the sheets along aligned groove lines.

대표청구항 ▼

A method of making erectable window cartons from a supply of sheets of substantially rigid plastic material and a supply of sheets of opaque material, said method comprising the steps of supplying a sheet of opaque material having an opening therein, feeding a sheet of substantially rigid transparen

A method of making erectable window cartons from a supply of sheets of substantially rigid plastic material and a supply of sheets of opaque material, said method comprising the steps of supplying a sheet of opaque material having an opening therein, feeding a sheet of substantially rigid transparent plastic material, positioning the sheet of plastic material into juxtaposition with the sheet of opaque material so that the plastic material substantially covers the opening in the opaque material, adhering the plastic material to the opaque material as positioned thereon, and forming at least one co-linear groove line in the adhered sheets extending across said plastic sheet and said opaque material sheet.