초록 ▼

A method of waste paper recycling wherein the unwanted portions of waste paper such as those containing a binder adhesive are separated from the remaining paper material. In the binding of books, catalogues, directories, pamphlets, magazines and the like, adhesive material is provided having a magne

A method of waste paper recycling wherein the unwanted portions of waste paper such as those containing a binder adhesive are separated from the remaining paper material. In the binding of books, catalogues, directories, pamphlets, magazines and the like, adhesive material is provided having a magnetic substance therein and in subsequent recycling, the waste paper from these books and magazines is cut into a plurality of relatively small pieces. These pieces are passed through a magnetic field wherein the portions containing the adhesive having magnetic material therein, are separated from the remaining non-magnetically attracted sheets of paper. The process can be carried out wet or dry and the invention also includes a new type adhesive for use in book, magazine, catalogue and pamphlet binding processes wherein a proportion of magnetic or paramagnetic material is integrated with the adhesive material (preferably of the hot melt type commonly used in binding books) so that upon subsequent recycling of the books, etc. as waste paper, the adhesive containing portions of the paper may be magnetically separated from the rest of the waste paper sheets.

대표청구항 ▼

A method of treating paper comprising the steps of: providing a magnetic material in an adhesive substance to form a magnetic adhesive for binding together paper sheets; applying said magnetic adhesive to a selected part of said paper sheets for securing said sheets together along a common edge; cut

A method of treating paper comprising the steps of: providing a magnetic material in an adhesive substance to form a magnetic adhesive for binding together paper sheets; applying said magnetic adhesive to a selected part of said paper sheets for securing said sheets together along a common edge; cutting said secured together sheets of paper into a plurality of relatively small pieces so that a first group of said pieces has bits of said magnetic adhesive adhering thereto and a second group of said pieces is free of said magnetic adhesive; passing all said pieces through a magnetic field for attraction toward a magnetic collector only those pieces of said first group having said magnetic adhesive adhering thereto; and separating the unattracted pieces of said second group of pieces from those magnetically attracted pieces of said first group of pieces.