Abstract: A paper conveyance device for a printing device that prints information using a printhead on conveyed continuous paper R, including a paper conveyance mechanism that holds and conveys the continuous paper to the print area of the printhead, and a guide unit that has two guide surfaces facing the conveyed continuous paper. The guide unit has a plurality of ribs that are disposed to at least one of the two guide surfaces with a specific gap therebetween in the direction perpendicular to the conveyance direction, protrude to the continuous paper side, and extend in the conveyance direction. The rib located in the middle of the width of the conveyed continuous paper being the longest of the plural ribs in the conveyance direction, and the length in the conveyance direction of the other ribs becoming gradually shorter with proximity to the sides of the continuous paper width.

Abstract: A paper conveyance device for a printing device that prints information using a printhead on conveyed continuous paper R, including a paper conveyance mechanism that holds and conveys the continuous paper to the print area of the printhead, and a guide unit that has two guide surfaces facing the conveyed continuous paper. The guide unit has a plurality of ribs that are disposed to at least one of the two guide surfaces with a specific gap therebetween in the direction perpendicular to the conveyance direction, protrude to the continuous paper side, and extend in the conveyance direction. The rib located in the middle of the width of the conveyed continuous paper being the longest of the plural ribs in the conveyance direction, and the length in the conveyance direction of the other ribs becoming gradually shorter with proximity to the sides of the continuous paper width.

Abstract: A synthetic resin cover having a grip is mounted on the upper surface of an upper case board that constitutes part of the fixing housing and covers the upper side of the fixing roller of an image forming machine. The cover has a cover body and attaching portions, the lower surfaces of the attaching portions being higher than the lower surface of the cover body. The attaching portion includes a cylindrical portion having a fastening member insertion hole and a receiving portion provided at the lower end of the cylindrical portion and having an insertion hole. The fastening member has a head portion of a diameter larger than that of the insertion hole formed in the receiving portion, a columnar portion connected to the head portion and having a diameter smaller than that of the insertion hole but is larger than that of a threaded hole formed in the upper case board, and a threaded portion that is connected to the columnar portion and that can be screwed into the threaded hole formed in the upper case board.

Abstract: A fixing device in an image-forming machine comprising a lower housing, an upper housing supported on one side of said lower housing and allowed to rotate between a closed position and an open position, a pressing roller rotatably mounted on said lower housing, and a heating roller having bearing members attached to both ends thereof and is detachably mounted on said upper housing, said upper housing being provided with nearly semicircular recessed mounting portions with which will be fitted said bearing members of said heating rollers.

Abstract: A paper-feeding device which includes a paper-feeding cassette removably located into an image processing apparatus, a locking mechanism for inhibiting extraction of the paper-feeding cassette by engaging with the cassette or a cassette mount, and a locking control device for activating operation of the locking mechanism while a paper-feeding operation is underway. Since the locking control device remains activated while the paper-feeding operation is underway, the operator cannot extract the paper-feeding cassette from the image processing apparatus during a paper-feeding operation.