Abstract: A writing instrument comprising a liquid spray head serving to spray liquid onto a medium from a distance, and a processor unit serving to activate the spray head. The instrument further comprises measurement means for measuring the distance between the spray head and the medium, and holding detector means for detecting that the instrument is being held by the user, the processor unit being adapted to activate the liquid spray head when firstly the measurement means determine that the distance between the spray head and the medium is less than a predetermined maximum value, and when secondly the holding detector means detect that the instrument being held by the user.

Abstract: An optical proximity sensor adapted to be mounted in a liquid-jet instrument having a spray head for spraying a jet of liquid. The optical sensor evaluates a distance between the sensor and a surface onto which the liquid is to be sprayed.

Abstract: A liquid feed unit intended to be mounted in a liquid spray instrument. The unit includes a liquid cartridge and a liquid spray head connected to the liquid cartridge. The liquid feed unit also comprises an energy supply source attached to the liquid cartridge so as to form a preassembled feed unit intended to be mounted directly in the liquid spray instrument.

Abstract: An embodiment of the present invention relates to liquid jet heads, and to liquid ejecting instruments including such liquid jet heads. The liquid ejecting instruments may be formed by ink jet printers or self-contained writing devices and in particular, to those devices that employ a non-contact method of transferring ink to a writing medium. An embodiment of the present invention also concerns those liquid or ink ejecting instruments that can be held in a user's hand.

Abstract: The ball point comprises a body having a front surface and a housing emerging in an opening in the front surface and communicating with a passage supplying a fluid. A ball can rotate freely in the housing. The body front surface has a peripheral portion parallel to the median plane of the opening and a flared portion adjacent to the opening periphery which forms at the point of contact of the ball with the opening periphery an acute angle (alpha) with the emerging part of the plane tangent to the ball at the contact point.

Abstract: A writing instrument comprising a liquid spray head and a processor unit serving to activate the spray head. The instrument further comprises measurement means for measuring the distance between the spray head and the medium, and movement detector means, the processor unit being adapted to activate the liquid spray head when at least the measurement means determine that the distance between the spray head and the medium is less than a predetermined maximum value, the processor unit also being adapted to manage activation of the spray head as a function of the movement detected by the movement detector means.

Abstract: A writing instrument comprising a liquid spray head serving to spray liquid onto a medium from a distance, and a processor unit serving to activate the spray head. The instrument further comprises measurement means for measuring the distance between the spray head and the medium, and holding detector means for detecting that the instrument is being held by the user, the processor unit being adapted to activate the liquid spray head when firstly the measurement means determine that the distance between the spray head and the medium is less than a predetermined maximum value, and when secondly the holding detector means detect that the instrument being held by the user.

Abstract: The ball point comprises a body having a front surface and a housing emerging in an opening in the front surface and communicating with a passage supplying a fluid. A ball can rotate freely in the housing. The body front surface has a peripheral portion parallel to the median plane of the opening and a flared portion adjacent to the opening periphery which forms at the point of contact of the ball with the opening periphery an acute angle (alpha) with the emerging part of the plane tangent to the ball at the contact point.

Abstract: A writing instrument comprising a liquid reservoir for containing a liquid, a liquid spray head for spraying liquid, the spray head serving to spray the liquid onto a medium from a distance, and a processor unit serving to activate the spray head. The instrument further comprises measurement means for measuring the distance between the spray head and the medium, and movement detector means for detecting movement of the spray head relative to the medium, the processor unit being adapted to cause the liquid spray head to be activated when both the measurement means detect that the distance between the spray head and the medium is less than a predetermined maximum value, and simultaneously the movement detector means detect movement of the spray head relative to the medium.

Abstract: A writing instrument comprising a liquid reservoir for containing a liquid, a liquid spray head for spraying liquid, the spray head serving to spray the liquid onto a medium from a distance, and a processor unit serving to activate the spray head. The instrument further comprises measurement means for measuring the distance between the spray head and the medium, and movement detector means for detecting movement of the spray head relative to the medium, the processor unit being adapted to cause the liquid spray head to be activated when both the measurement means detect that the distance between the spray head and the medium is less than a predetermined maximum value, and simultaneously the movement detector means detect movement of the spray head relative to the medium.