Provided is a manufacturing method for an airtight container excelling in airtightness and adhesion and having small stress. An area where temperature easily rises compared to an area adjacent to an area of a part of a joint member and capable of melting the adjacent area by laser beam irradiation is provided in the area of a part of the joint member, and the laser beam irradiation is started therefrom.

There are provided a novel benzofluoranthene compound and an organic light-emitting device which uses the benzofluoranthene compound, gives a blue emission hue with extremely good purity, and has an optical output with a high efficiency, a high luminance, and a long life. Specifically, there are provided a benzofluoranthene compound represented by the general formula shown below and an organic light-emitting device including a pair of electrodes including an anode and a cathode one of which is a transparent or translucent electrode material, and an organic compound layer disposed between the pair of electrodes and including a material for an organic light-emitting device containing the benzofluoranthene compound. ##STR00001## In the general formula (1), one of X.sub.1, X.sub.2, X.sub.3, X.sub.4, X.sub.5, and X.sub.6 represents a substituted or unsubstituted fused heterocyclic group having four or less rings, and the others of X.sub.1, X.sub.2, X.sub.3, X.sub.4, X.sub.5, and X.sub.6 each represent a hydrogen atom.

A recording apparatus is capable of reliably correcting skew feeding of a recording sheet in an arrangement for conveying the recording sheet absorbed by a belt surface. The recording apparatus includes: a driving roller for driving the conveying belt wound around the driving roller and electrically charging the conveying belt by application of a voltage; and a pinching roller abutting against the driving roller via the conveying belt. A pinching section, which is formed by the driving roller and the pinching roller, corrects skew feeding of the recording sheet fed from the paper feed section and thereafter the voltage is applied to the driving roller to electrically charge the conveying belt.

A method for controlling a printing system includes stacking a sheet printed by executing a job on a stacking unit provided inside a stacker, the stacker including a door that can be opened and closed, opening the door in a case where a predetermined instruction is input by a user, and in a case where the predetermined instruction is input while a job for stacking the sheet on the stacking unit, control to output the sheet discharged by executing the currently executed job on an output destination different from the stacking unit.

There is provided a green-light-emitting device which has a high emission efficiency and a long continuous operational life, and which includes a pair of electrodes including an anode and a cathode; and a layer including an organic compound disposed between the pair of electrodes, wherein the layer includes a first compound represented by the general formula (I): ##STR00001## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11, R.sub.12, R.sub.13, R.sub.14, R.sub.15, and R.sub.16 each represent, independently of one another, a hydrogen atom, an alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted amino group, or a halogen atom; and a second compound with a pyrene skeleton or a fluorene skeleton having an energy gap larger than an energy gap of the first compound.