Abstract: A recording apparatus builds up positive pressure in its interior with air being supplied by a fan. Filter rejects any dust and dirt contained in the air so they will not enter the apparatus. Humidifier has a water-imbibed water-retaining material in its interior and humidifies the interior of the recording apparatus so that the internal humidity is always maintained at an optimum value. The recording apparatus ensures that there will be no change of the internal humidity that would otherwise deteriorate the performance of the constituent members of the apparatus or reduce the sensitivity of the sensitive material in the recording medium and this contributes to preventing unevenness in the finished image. The recording apparatus is also free from the development of static charge in the areas of contact between the recording medium and the constituent members and from the subsequent occurrence of transport jam and failures in electronic components.

Abstract: A sheet conveying mechanism for a printer which records an image on a sheet fed from a sheet feeder, includes a hard pinch roller; and a capstan roller confronting the pinch roller, the capstan roller associating with the pinch roller to convey at least one sheet. The capstan roller has a surface on which a plurality of projections are formed. The height of the projections is 60 &mgr;m±40 &mgr;m, a projection pitch in an axial direction of the capstan roller is 0.5 mm±0.2 mm, and the projections are arranged on half or more of the area of the surface of the capstan roller.

Abstract: Recording apparatus 1 builds up positive pressure in its interior with air being supplied by means of fan 3. Filter 4 rejects any dust and dirt contained in the air so they will not enter the apparatus. Humidifier 5 has a water-imbibed water-retaining material in its interior and humidifies the interior of the recording apparatus 1 so that the internal humidity is always maintained at an optimum value. The recording apparatus 1 ensures that there will be no change of the internal humidity that would otherwise deteriorate the performance of the constituent members of the apparatus or reduce the sensitivity of the sensitive material in the recording medium and this contributes to preventing unevenness in the finished image. The recording apparatus is also free from the development of static charge in the areas of contact between the recording medium and the constituent members and from the subsequent occurrence of transport jam and failures in electronic components.

Abstract: An image transfer apparatus preventing transfer misregistration is disclosed. The apparatus comprises a driving roller, a following roller, and a carry including a guide plate and a cover film, wherein an image receiving sheet and a photosensitive material, which are overlapped with each other, are sandwiched by the guide plate and the cover film and then nipped between the driving roller and the following roller in the carry so as to be pressed and conveyed, and a pair of beam members extending along a conveying direction of the carry are disposed at the sides of the guide plate with the cover film being placed therebetween and the upper end portions of the beam members are projected from the upper surface of the cover film laid on top of the photosensitive material.

Abstract: A heat sensitive recording material which is comprised of a support having thereon at least a transparent heat sensitive layer excellent in freshness-keeping property is disclosed. The transparent heat sensitive layer is obtained by coating a solution obtained by mixing a microcapsule containing a colorless or light colored electron donating dye precursor with an emulsion prepared by dispersing a color developer dissolved in an organic solvent, which is slightly soluble or insoluble in water, into an aqueous solution containing both of a surface active agent and water soluble polymer. The stabilities of emulsion and heat sensitive layer are improved by using a partially saponified polyvinyl alcohol as the water soluble polymer and/or adding a metal salts of a salicylic acid derivatives into the coolor developer. A heat sensitivity of the heat sensitive recording material is improved by using a organic solvent having a boiling point lower than 150.degree. C.

Abstract: This invention discloses a manufacturing method of a heat sensitive material having a transparent heat sensitive layer comprised of controlling transparency of heat sensitive layer by coating a composition containing an emulsified dispersion prepared by dispersing a color developer dissolved into an organic solvent slightly soluble or insoluble in water and microcapsules containing at least a colorless or light colored electron donating dye precursor (core material) and then drying the coat, in which a refractive index of the core material and that of an oil phase of the color developer dispersion are properly adjusted. When providing a transparent heat sensitive layer obtained by the above method on a printed support, a printed matter can be seen through the heat sensitive layer.

Abstract: A negative type heatsensitive recording material which can realize high contrast image suitable to overhead projector, comprising on a support a heatsensitive layer prepared by coating a composition containing an emulsified dispersion, which is obtained by dissolving a colorless or light colored electron donating dye precursor and a color developer in an organic solvent slightly soluble or insoluble in water then subjecting the resulting solution to an emulsifying dispersion treatment, and decolorizercontaining microcapsules.

Abstract: A heat sensitive recording material which comprises a support having thereon a heat sensitive layer containing at least color former-contained microcapsules and a color developer, with the heat sensitive layer being formed using a colorless or light colored precursor of a basic dye as the color former, and according to a process which comprises preparing a coating composition by mixing the color former-contained microcapsules with an emulsified dispersion prepared by dissolving at least the color developer into an organic solvent which is slightly soluble or insoluble in water, and then dispersing the solution in an emulsified condition, coating the resulting composition on the support, and then drying the coat, whereby the heat sensitive layer comes to acquire both excellent transparency and high sensitivity to heat.