Abstract: A component mounting system includes: a component mounter that moves a mounting head and allows a suction nozzle mounted in the mounting head to suck a component supplied by a parts feeder to mount the component on a substrate; a head maintenance device that executes maintenance of the mounting head; an inspection section that inspects a state of the mounting head undergone the maintenance; a use suitability determination section that determines whether or not use of the mounting head undergone the maintenance is suitable based on a result of the inspection; and a registration section that registers the mounting head determined to be not suitable for use.

Abstract: A component mounting system includes: a component mounter that moves a mounting head and allows a suction nozzle mounted in the mounting head to suck a component supplied by a parts feeder to mount the component on a substrate; a head maintenance device that executes maintenance of the mounting head; an inspection section that inspects a state of the mounting head undergone the maintenance; a use suitability determination section that determines whether or not use of the mounting head undergone the maintenance is suitable based on a result of the inspection; and a registration section that registers the mounting head determined to be not suitable for use.

Abstract: A suction-and-holding face for a component in a suction nozzle is formed from a semiconductor ceramic so that the suction-and-holding face to be brought into direct contact with the component in suction and holding has the characteristics of a semiconductor. Thus, detrimental effects due to static electricity on the suction nozzle as well as detrimental effects due to electrical conduction between the suction nozzle and the component can be prevented from occurring.

Abstract: A suction-and-holding face (14) for a component (1) in a suction nozzle (3) is formed from a semiconductor ceramic so that the suction-and-holding face to be brought into direct contact with the component in suction and holding has characteristics as semiconductor. Thus, detrimental effects due to occurrence of static electricity on the suction nozzle as well as detrimental effects due to an electrical conduction state between the suction nozzle and the component can be prevented from occurring.

Abstract: A light source image, i.e., a near field pattern of the light-emitting face of a laser diode which emits laser light having the electric field component in a predetermined direction is formed by an imaging lens at an image forming position of a smoke detecting area through which a flow of sucked air passes. A light receiving device is disposed on an optical axis which passes through the image forming position of a light source image in the smoke detecting area and which is set in a plane that is substantially parallel to the direction of the electric field component of the laser light, and receives scattered light due to a smoke particle passing through the imaging position of the light source image and the vicinity of the imaging position.

Abstract: The pulse width of a light reception pulse signal a from a light receiving device is detected, and the smoke density is detected based on a total pulse width of pulse widths per unit time period. Alternatively, the smoke density may be detected based on an integrated value of the light reception pulse signal a from the light receiving device per unit time period. Even if the flow rate of the sucked air is varied, the total light reception pulse width value per unit time period is not varied, so that the smoke density can be accurately detected.

Abstract: Bubble jet recording is performed using a recording head with an orifice for projecting liquid. A liquid path with a plurality of electrothermal transducers is in fluid communication with the orifice. The transducers are selectively driven to change the amount of liquid ejected from the orifice.

Abstract: A recording apparatus comprises an inlet for accepting a liquid to be delivered to an outlet orifice through a liquid flow path. Liquid is supplied to the inlet for flow through the liquid flow path to a heating element, which heats liquid in the liquid flow path. Heating is sufficient to cause a change of state of the liquid (that is, to generate a bubble) and produce a force acting on the liquid which overcomes the surface tension of liquid at the orifice and thereby projects a droplet of liquid from the orifice. The temperature of the heating element is raised at each actuation to a temperature above the maximum temperature at which the liquid in the liquid flow path is subjected only to nucleate boiling so as to promote substantially instantaneous transfer of heat to the liquid proximate to the heating element and to retard the transfer of heat from the heating element to liquid at other locations in the liquid flow path.

Abstract: A recording apparatus for recording an image sensed by a photosensor comprises an inlet for accepting a liquid to be delivered to an outlet orifice through a liquid flow path. Liquid is supplied to the inlet for flow through the liquid flow path to a heating element, which heats liquid in the liquid flow path in response to signals received by the photosensor. Heating is sufficient to cause a change of state of the liquid (that is, to generate a bubble) and produce a force acting on the liquid which overcomes the surface tension of liquid at the orifice and thereby projects a droplet of liquid from the orifice.

Abstract: Liquid droplets are formed by instantaneous state change by thermal energy of a liquid filled in a thermal chamber, said droplets being deposited onto a recording member to achieve recording.

Abstract: A cross-linked copolymer containing repeating units derived from a mixture comprising the following monomers: ##STR1## and occasionally other repeating units derived from other metathesis polymerizable cyclic compounds such as dicyclopentadiene, a process for producing the copolymer, a process for producing a molded article from the copolymer and a polymerizable composition therefor.

Abstract: A process for producing a molded article by introducing a reactive liquid mixture which comprises a cycloalkene containing dicyclopentadiene, a norbornene-type monomer containing at least one N-substituted 5-membered cyclic imide group and a metathesis polymerization catalyst system and which has moderated metathesis polymerizability into a mold in which the liquid mixture is metathesis polymerized, and a multi-part polymerizable composition for producing the molded article.

Abstract: A method for improving the properties of a metathesis polymerized cycloolefin article by treating with molecular halogen in an organic solvent. Degree of treatment can be regulated according to the swelling power of the solvent for the polymer. Improved properties include improved flame retardance, oxidation resistance and surface properties.

Abstract: A cross-linked copolymer containing repeating units derived from a mixture comprising the following monomers: ##STR1## and occasionally other repeating units derived from other metathesis polymerizable cyclic compounds such as dicyclopentadiene, a process for producing the copolymer, a process for producing a molded article from the copolymer and a polymerizable composition therefor.

Abstract: A cross-linked copolymer containing repeating units derived from dicyclopentadiene and metathesis polymerizable halogen-containing cycloalkenes, a process for producing the copolymer, a process for producing a molded article from the copolymer and a polymerizable composition therefor.

Abstract: A cross-linked copolymer comprising repeating units derived from a mixture comprising metathesis polymerizable cyclic compounds such as dicyclopentadiene and carboxylic acid esters of which the acid residue and alcohol residue have individually at least one norbornene-moiety, a process for producing the copolymer, a process for producing a molded article from the copolymer and a polymerizable composition therefor.

Abstract: A process for producing a colored cross-linked molded article by metathesis polymerizing in a mold a mixture comprising metathesis polymerizable monomers such as dicyclopentadiene and a metathesis polymerizable multi-part composition therefor.

Abstract: A polymer prepared by metathesis polymerizing at least one compound represented by the formula ##STR1## wherein m is 0 or 1 and R.sub.1 and R.sub.2 respectively represent hydrogen atom or an alkyl group containing up to three carbon atoms provided that both R.sub.1 and R.sub.2 are not hydrogen atom at the same time, or a mixture of said compound with at least one other metathesis polymerizable comonomer, a useful molded article, processes for preparing the polymer and a polymerizable composition therefor.

Abstract: A bubble jet recording apparatus comprises an inlet for accepting a liquid to be delivered to an outlet orifice through a liquid flow path. Liquid is supplied to the inlet for flow through the liquid flow path to a heating element, which heats liquid in the liquid flow path in response to recording signals. Heating is sufficient to cause a change of state of the liquid (that is, to generate a bubble) and produce a force acting on the liquid which overcomes the surface tension of liquid at the orifice and thereby projects a droplet of liquid from the orifice. The temperature of the heating element is raised at each actuation to a temperature above the maximum temperature at which the liquid is heated so as to promote substantially instantaneous transfer of heat to the liquid proximate to the heating element and to retard the transfer of heat from the heating element to liquid at other locations in the liquid floor path.

Abstract: Liquid droplets are formed by instantaneous state change by thermal energy of a liquid filled in a thermal chamber, said droplets being deposited onto a recording member to achieve recording.