Abstract: A printhead with a printhead die, an ink manifold and heat sink substrate has a continuous sealing surface surrounding the printhead die which is formed by the ink manifold, heat sink substrate and filler material disposed therebetween. The filler material acts as caulking to eliminate gaps around the printhead die, particularly between the ink manifold and heat sink substrate, and to provide a smooth surface for abutment with a capping member. A fluid-tight seal is obtained between the capping member and the continuous sealing surface on the printhead, thus preventing the drying out of ink in the nozzles through evaporation of volatile ink components. In some priming nozzle configurations, the leaktight seal also facilitates priming of the printhead.

Abstract: In a single pass, tri-level imaging apparatus, machine cycle down is initiated when the color developer housing is functioning improperly. The voltage level of the color image prior to its development is read using an electrostatic voltmeter (ESV). The voltage level thereof is also read after development. The difference between these two readings is compared to an arbitrary target value and a machine cycle down is initiated if the difference is greater than the target.

Abstract: According to this invention, a copying condition such as a masking or trimming area is set in advance by an electronic notebook. When the electronic notebook is loaded on a copying machine, the preset copying condition is transmitted from the electronic notebook to the copying machine. The copying machine performs copying in accordance with the transmitted copying condition. As a result, the electronic notebook and its exclusive IC card can be used as part of the operation panel of the copying machine main body, thereby simplifying the operation panel of the copying machine main body. Since the electronic notebook is portable, the copying condition can be input restfully at an arbitrary place. A telephone number list and a memo list stored in the electronic notebook can be printed out at a high speed. A blue portion of an original not to be reproduced in a copy can be discriminated. Writing of a mark and the like, trimming, and masking can be performed by using the discriminated content.