Abstract: A weft knitted composite fabric comprises a frontal layer of a weft knitted fabric, a rear layer of a weft knitted fabric and binding yarns. Said rear layer of the weft knitted fabric is bound with said frontal layer by weave of said binding yarns and arranged with a given distance separating the frontal layer and the rear layer. Said binding yarns are more stiff than knitting yarns of said frontal layer and said rear layer. Said binding yarns comprise S-twist yarns and Z-twist yarns alternately. Said frontal layer of a weft knitted fabric may include knitting yarns for pile so that a surface of said frontal layer is provided with a pile.

Abstract: Back-splitting apparatus for use in the production of books such as account books, notebooks, textbooks and the like for separating a block of stacked sheets of paper, bound together at one side by gluing and constituting a plurality of books, into individual books. A plurality of projection pieces are provided at one sides of the final sheets of the respective books of the block. A suction member is disposed at the position faced with one of the projection pieces, and a pawl member is disposed movably to the lower portion of the suction member. The block of stacked sheets of paper is separated into individual books accurately by advancing a back-splitting cutter knife into the back surface side of the projection piece interposed between the suction member and the pawl member. Thus, this apparatus can effectively separate a block of stacked sheets of paper made of thick and extremely thin sheets.

Abstract: A cutter for a cutting machine wherein a large number of inclined grooves having an angle relative to the edge of the cutter are formed in parallel on the rear side of the cutter, whereby the job of cutting stacked sheets of paper into book blocks of a predetermined size and the job of forming groove portions at the back parts of the book blocks can be simultaneously executed in the production of brochures.

Abstract: In the process of producing brochures such as account books, textbooks, notebooks and chits, a back-splitting operation which has hitherto been performed by hand is mechanically executed in such a way that a back-splitting cutter knife is attached to a turnable chain and that the cutter knife is thrust into the back portion of sheets of paper for the brochures, whereby the productivity of the process is enhanced and a sharp reduction in the cost thereof is achieved.