Abstract: A closing tape prevents winding looseness of a roll photo film and a light-tight sheet which are wound around a spool. After an adhesive agent layer formed on one end of the closing tape is adhered to a surface of the light-tight sheet, an adhesive agent layer formed on the other end of the closing tape is adhered to a surface of the closing tape. The adhesive agent layer consists of multiple adhesive dots. The respective dots are formed by heat sensitive adhesive agent filled in the respective cells of a gravure roll to coat on the closing tape by gravure coating. Adhesive force is stabilized due to uniformity in size and thickness of the dots. Moreover, the cells are provided at same intervals and heat sensitive adhesive agent having optimum viscosity is used, so that the adjacent dots are prevented from connecting each other.

Abstract: A closing tape prevents winding looseness of a roll photo film and a light-tight sheet which are wound around a spool. After an adhesive agent layer formed on one end of the closing tape is adhered to a surface of the light-tight sheet, an adhesive agent layer formed on the other end of the closing tape is adhered to a surface of the closing tape. The adhesive agent layer consists of multiple adhesive dots. The respective dots are formed by heat sensitive adhesive agent filled in the respective cells of a gravure roll to coat on the closing tape by gravure coating. Adhesive force is stabilized due to uniformity in size and thickness of the dots. Moreover, the cells are provided at same intervals and heat sensitive adhesive agent having optimum viscosity is used, so that the adjacent dots are prevented from connecting each other.

Abstract: A photographic roll film such as Brownie film is placed on a backing paper or a leader paper. The roll film is joined at its one or both ends to the backing paper or leader paper with a jointing tape, which has on its surface a bar code composed of light absorbing bars and light reflecting spaces. The light absorbing bars show a reflectance of less than 30% and a glossiness of less than 20%, and the light reflecting spaces show a reflectance of more than 50% and a glossiness of less than 35%. Further, the total of the glossiness of light absorbing bars and the glossiness of light reflecting spaces is less than 50%. The reflectance and glossiness both are determined utilizing a light in a wavelength region other than a light sensitive wavelength region of the roll film.

Abstract: An apparatus for controlling output shaft torque of an engine in an engine tester by correction inertia of the dynamometer, comprising an operation pattern generator, a dynamometer processing unit, a dynamometer controller, and a dynamometer. The torque signal fed back to the dynamometer controller is not from the shaft torque meter but is of the dynamometer torque, and is not affected by the torsional vibration, and is controlled with good stability. Further, no time lag caused by the inertia of the dynaomometer develops in controlling the torque of the output shaft. Therefore, the torque of the output shaft can be controlled with high response and accuracy.

Abstract: A peel-apart type instant film unit comprising an image receiving sheet separably adhered in a heat sealing manner to a mask member which is peeled apart from the former after the development thereof. There is provided therebetween a weak sealing layer comprising an adhesive layer of a thermoplastic polymer having hydrophilic groups and a separating layer which is alkali resistant and has a good separation property relative to the adhesive layer. The weak sealing layer can provide an easy separation between the separating and adhesive layers so as perfectly to transfer the adhesive layer to the image receiving sheet to provide a fine appearance and a writeable image frame on the image receiving sheet. The mask member is made of any polyethylene compounded paper sheets and is provided with a processing liquid-resisting layer inside the weak sealing layer for the purpose of preventing the permeation of processing liquid thereto.