Abstract: An image generating apparatus allowing reduction of the thickness of a heat radiation member and allowing strong mounting of a holding member also when a print head is arranged on the forward end of a screw member is obtained. This image generating apparatus comprises a print head, a heat radiation member, arranged on the upper surface of the print head, including a mounting portion protruding toward the head of a screw member and having a threaded hole meshing with the screw member and a holding member, mounted on the upper surface of the heat radiation member with the screw member, having a mounting portion receiving hole capable of receiving the mounting portion of the heat radiation member and holding a prescribed member.

Abstract: A downsizable image generating apparatus capable of reducing the number of components is obtained. This thermal transfer printer (image generating apparatus) comprises a drive gear arranged on a first end of a support rod for rotating a head portion by transmitting driving force of a motor to a head portion pressing member. The head portion pressing member is provided with a gear portion meshing with the drive gear and a protrusion. The head portion is provided with a notch engaging with the protrusion of the head portion pressing member upon upward rotation of the head portion pressing member.

Abstract: An image formation apparatus or a sublimation printer includes a main frame, a platen roller, a head assembly, and a press lever. The platen roller is rotatably held between first and second side panels of the main frame. The press lever is pivotably supported on the first side panel of the main frame. The press lever presses the head portion against the platen roller with a predetermined pressing force when the press lever is pivoted. The first side panel has a groove that supports the press lever. The groove has a first wall portion on which the press lever abuts from a direction of the reaction force of the pressing force. The sublimation printer does not get deformed after repeated use, and therefore can generate the predetermined pressing force in a stable manner.

Abstract: An image formation apparatus or a sublimation printer includes a main frame, a platen roller, a head assembly, and an extension spring diagonally attached to the head assembly and the main frame so as to bias the head assembly in a direction away from the platen roller and in an axial direction of the platen roller. The head assembly has an arm portion and a head portion. The head assembly is pivotably held between side panels of the main frame so as to be pressed against and moved away from the platen roller. The extension spring keeps the thermal head away from the platen roller when printing is not performed, and also aligns the thermal head in the axial direction of the platen roller. The number of components of the sublimation printer can be reduced.

Abstract: A method for removing organic materials dissolved in purified phosphoric acid by decomposing it with hydrogen peroxide, characterized in that after the treatment with hydrogen peroxide, the purified phosphoric acid is contacted with reducing phosphorus compounds.

Abstract: A method for removing organic materials from a wet process phosphoric acid obtained by treating an uncalcined phosphate rock with sulfuric acid. The wet process phosphoric acid is contacted with a reducing material having a standard single electrode potential of at most 1.42 V and then further contacted with active carbon.

Abstract: A wet process phosphoric acid obtained by an solvent extraction method with n-butanol and/or isobutanol comprises(a) feeding a wet process phosphoric acid having a concentration of P.sub.2 O.sub.5 of higher than 35 wt. % into an extraction battery;(b) adding sulfuric acid into a stage in fifth or higher stage from the step of discharging an extracted solution and in second or higher stage from the step of discharging raffinate in the extraction battery at a gram equivalent ratio given by subtracting the amount of sulfuric acid in the wet process phosphoric acid fed into the extraction battery from 1.2 to 2.0 times of the sum of total cation impurities in the wet process phosphoric acid fed into the extraction battery and total components of sodium, potassium and magnesium added to the purification battery;(c) discharging said extracted solution having a concentration of H.sub.3 PO.sub.4 of 130 to 180 g.