A needle-point pen apparatus and methods for administering a medication. The needle-point pen apparatus can include a barrel, a needle movably disposed within an inner channel of the barrel, the needle having a tip and an elongate shaft. A driving unit is coupled to the needle and provides a driving actuation to the needle. The driving actuation causes the needle to reciprocate within the barrel between one or more extended and retracted positions. The needle being designed to at least partially insert the medication into living tissue. A medication reservoir supplies the medication to the needle for at least partial insertion into the tissue. A computing device controls the needle actuation and the supply of the medication to the needle for controlling administration of the medication at multiple different computer-controlled depths and/or locations of the tissue.

A printer comprising a printhead configured to selectively cause a mark to be created on a substrate, a first motor coupled to the printhead and arranged to vary the position of the printhead relative to a printing surface against which printing is carried out to thereby control the pressure exerted by the printhead on the printing surface, and a controller arranged to control the first motor. The controller is arranged to control the magnitude of current supplied to windings of the first motor so as to cause a predetermined pressure to be exerted by the printhead on the printing surface.

A printer comprising a printhead configured to selectively cause a mark to be created on a substrate, a first motor coupled to the printhead and arranged to vary the position of the printhead relative to a printing surface against which printing is carried out to thereby control the pressure exerted by the printhead on the printing surface, and a controller arranged to control the first motor. The controller is arranged to control the magnitude of current supplied to windings of the first motor so as to cause a predetermined pressure to be exerted by the printhead on the printing surface.

Needle-point pen apparatuses and methods for marking and/or creating articles and objects. Other uses for the needle-point pen are also disclosed herein. Further needle, ink, and carriage control improvements are further discussed as well as marking and manufacturing processes. Further control, characterization and design parameters, components, and processes are disclosed. Methods for designing and manufacturing articles as well as collaboration between artists and article designers, including distributed and remote collaboration, are disclosed. New marking techniques, computer control, software, hardware and interactive techniques are further disclosed. And, designs and use of the needle-point pens are further described and illustrated.

An application unit includes an application material container to contain an application material, and an application needle to apply, to a target surface, the application material contained in the application material container. A first hole is formed in a bottom of the application material container, and a second hole is formed in an upper lid of the application material container. The application needle is configured to be movable along a line passing through the first hole and the second hole. A third hole is formed in a part of the application material container for allowing air to pass through the third hole, or a lowermost end of a wall of the first hole has a chamfer.

An application unit includes an application material container to contain an application material, and an application needle to apply, to a target surface, the application material contained in the application material container. A first hole is formed in a bottom of the application material container, and a second hole is formed in an upper lid of the application material container. The application needle is configured to be movable along a line passing through the first hole and the second hole. A third hole is formed in a part of the application material container for allowing air to pass through the third hole, or a lowermost end of a wall of the first hole has a chamfer.