Abstract: A document conveying apparatus having a document conveying path, a plurality of document conveying units, and a plurality of document detecting units, the conveying and detecting units being disposed along the conveying path. The apparatus includes an inserting unit having a unit which detects, when the document detecting units are operating in a predetermined sequence while a document is being conveyed, an abnormality of the document according to the states of the respective document detecting units at a predetermine timing and a unit to stop the operation of the abnormality detecting unit. The document is conveyed from the inserting unit via an exposed unit to an ejecting unit.

Abstract: An improved electrostatic photo-copying machine is proposed. In this improved photo-copier, an optical system for scanning a document from which photocopies are to be made is provided. However, the movable range of the optical system is divided into a front half and a rear half, adapted for execution of successive scannings so as to provide a book copy mode operation. If, however, an incompatible operation to the book copy mode, for instance, manual feed of any suitable size copy paper through a manual feed opening; automatic document feed mode or the like has been specified, the once and in advance selected-out book copy mode is automatically released from service.

Abstract: A copying machine wherein a magnification ratio can be changed substantially continuously within a predetermined range, comprising means for setting a longitudinal magnification ratio of a copied image against an original and a lateral magnification ratio of a copied image against the original independently, image shifting means for shifting an image projected on a photosensitive drum in a direction away from a paper separation belt, first calculating means for calculating a lateral magnification factor, second calculating means for calculating a longitudinal magnification factor, and means for modifying the longitudinal and lateral copy magnification ratios respectively using the selected magnification ratio, the longitudinal and lateral magnification factors, whereby an image can be formed on the copy paper, preventing image drop out.

Abstract: Disclosed are an N-benzenesulfonyl derivative of cephamycin C represented by the following formula: ##STR1## which can easily be separated as a solid from an aqueous solution thereof, and a process for the preparation thereof.This derivative is valuable as an intermediate leading to a cephamycin type antibiotic substance.

Abstract: Novel .alpha.-methyl-.beta.-aminopropiophenone derivatives having bronchodilator activity represented by the following general formula: ##STR1## where R represents alkyl having 1-6 carbon atom benzyl or phenyl; R.sub.1 and R.sub.2 individually represent alkyl having 1-6 carbon atom or they form, joining to each other together with the adjacent nitrogen atom with or without intervening an atom other than carbon atom, a saturated heterocyclic ring which may be substituted with lower alkyl; n is an integer of 0, 1 or 2 on the proviso that R represents methyl or ethyl if n is 0, as well as their non-toxic salts are presented. Method of producing the new derivatives and the bronchodilatation method using them are disclosed as well.