Abstract: In an electrophotographic copying machine of the type utilizing a single-component developer applied to a photosensitive member through the use of a magnetic brush; a regulating plate is positioned across the sleeve of the brush immediately prior to the juxtaposition of the sleeve and the photosensitive member in order to prevent spill-over of excess magnetic toner. This plate is preferably in addition to another regulating plate placed across the sleeve upstream of the first regulating plate where the developer is fed to the sleeve. Both plates have wider outer edges closely spaced to the sleeve to prevent rising of the developer over these outer edges when the magnetic force of the brush is weak and does not hold the developer to the sleeve.

Abstract: A recording apparatus having a roller type fixing device made up of a first roller and a second roller for fixing the image to the transfer paper. The recording apparatus has an upper guide plate placed over the transfer paper passage on the inlet side of the roller type fixing device, the upper guide plate being curved down gradually toward the front end and extending near the lower portion of the first roller. The upper guide plate has on its underside a plurality of projecting strips extending in the direction of the paper feed.

Abstract: A temperature detecting device for image fixing means is used in an electrostatic recording apparatus, in which a temperature sensor element is supported on a mounting member through a slender conductive element at a small distance from the surface of and in the direction of length of the fixing means to be detected, so as to detect the temperature thereof with accuracy.

Abstract: An apparatus for measuring a temperature comprising a temperature measuring element. Said temperature measuring element is arranged closely to a surface of an article whose temperature is to be measured, an electric property of said temperature measuring element being varied corresponding to a temperature variation, and lead wires of said temperature measuring element are arranged so as to stretch closely to and along by the surface of said article.

Abstract: A roller type fixing apparatus for an electrophotographic copying machine comprising a fixing roller, a pressing roller disposed to confront and have contact with said fixing roller and a mechanism for rotating said fixing roller and press roller. At least one of said fixing roller and press roller has a peripheral surface layer portion composed of a resinous material and a low electric resistance powder incorporated therein and said peripheral surface layer portion is electrically grounded.