Abstract: A reliable, small and light stencil duplicating machine comprises a printing section, a sheet feeding section, and a sheet discharging section. The printing section includes a printing drum for wrapping a stencil thereon, a press roller and parts associated with a printing process. The sheet feeding section feeds each printing sheet into a space between the printing drum and the press roller. A printed sheet is stripped off from the printing drum by a sheet separating member of the sheet discharging section, and is discharged onto a tray.

Abstract: Amidine derivatives of the formula ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, represent each a hydrogen atom or a lower alkyl group, or R.sub.1 and R.sub.2 together with an intermediary carbon atom and/or hetero atom may form a ring; X represents ##STR2## (wherein R.sub.8 represents a hydrogen atom, a lower alkyl group, or --CH.sub.2 COOR.sub.9, where R.sub.9 represents a hydrogen atom or a lower alkyl group; Z represents a single bond, --CH.sub.2 --, --CH.sub.2 CH.sub.2 --, or --CH.dbd.CH--); R.sub.3 represents a hydrogen or chlorine atom, methoxy group, nitro group, or amino group; Y represents --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --CH.sub.2 O--, or --OCH.sub.2 --; R.sub.4 represents a hydrogen atom, methoxy group, benzoyl group, nitro group, or amino group; and R.sub.5, R.sub.6 and R.sub.

Abstract: Catalysts for purification of exhaust gases from internal combustion engines which are a mixture of aluminum oxide, calcium oxide and one or more of the elements platinum, palladium and rhodium, and method for their use.