Print head with lubricator
AssigneeMannesmann Aktiengesellschaft
InventorsBernd Gugel, Johann Stempfle
Life of this patent
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Abstract
A matrix print head comprises several armature device groups which, in each case, comprise a magnet yoke (9) with an electromagnetic coil (10), disposed on one of the magnet yoke arms (9a), and an armature (8), which armature serves as a drive for a print element (2). The armature (8) can be moved in a rapid sequence against the pole faces (20b) of the magnet yokes (9) and back into a rest position. In order to reduce the wear at the pole faces (20a and 20b) or, respectively, at the wear faces (18), high temperature-stable lubricants can be disposed and intercalated in capillary hollow spaces (17) of armatures (8) and/or magnet yokes (9). These capillary hollow spaces (17) are adjoining and running to the wear faces (18).
Claims20
A matrix print head comprising
- a plurality of armature device groups, with each armature device group comprising
- a magnet yoke formed of lamellas with capillary hollow spaces disposed between the lamellas and wherein the capillary spaces are formed by superposition of the lamellas and wherein the lamellas are fixedly attached to each other, said magnet yoke having a first arm and having a second arm and each arm having a pole wear face, wherein the capillary hollow spaces are leading to and adjoining the pole wear faces of the magnet yoke and forming a first magnetic circuit element to be attached to a print head casing;
- an electromagnetic coil disposed on the first arm of the magnet yoke;
- a print pin element;
- an armature mechanically connected to the print pin element and forming a second magnetic circuit element and having an armature wear face for contacting a respective one of the pole wear faces during operation and serving as a driver for the print element, where the armature is movable and positionable in a rapid sequence against the pole wear faces of the respective magnet yoke and back into a rest position depending on actuating currents passing through the electromagnetic coil;
- a temperature-stable lubricant deposited into the capillary hollow spaces.
A matrix print head with several armature device groups, which armature device groups comprise
- a magnet yoke formed of a plurality of superposed lamellas with capillary hollow spaces formed between the superposed lamellas, wherein the lamellas are fixedly attached to each other, and wherein said magnet yoke is to be attached to a print head casing and having two magnet yoke arms and furnished with an electromagnetic coil disposed on one of the magnet yoke arms, and an armature, which armature serves as a drive for a print element, where the armature is movable and positioned in a rapid sequence against pole wear faces of the magnet yoke and back into a rest position, wherein temperature-stable lubricants are deposited into the capillary hollow spaces (17) of the magnet yoke (9), and wherein these capillary hollow spaces (17) are leading to and are adjoining the pole wear faces (18).
A matrix print head with several armature device groups, which armature device groups comprise a magnet yoke having two magnet yoke arms and furnished with an electromagnetic coil disposed on one of the magnet yoke arms, and an armature, wherein the armature is formed of lamellas with capillary hollow spaces disposed between the lamellas, and wherein the capillary hollow spaces are formed by superposition of the lamellas, and wherein the lamellas are fixedly attached to each other, said armature serving as a drive for a print element, where the armature is movable and positioned in a rapid sequence against pole wear faces of the magnet yoke and back into a rest position, wherein the armature contains temperature-stable lubricants deposited into the capillary hollow spaces (17) of the armature (8), and wherein these capillary hollow spaces (17) are leading to wear faces (18) of the armature (8).
A matrix print head comprising
- a plurality of armature device groups, with each armature device group comprising
- a magnet yoke having a first arm and having a second arm and each arm having a pole wear face and forming a first magnetic circuit element attached to a print head casing;
- an electromagnetic coil disposed on the first arm of the magnet yoke;
- a print pin element;
- an armature formed of lamellas with capillary hollow spaces disposed between the lamellas and wherein the lamellas are fixedly attached to each other, said armature being mechanically connected to the print pin element and forming a second magnetic circuit element and having
- an armature wear face for contacting a respective one of the pole wear faces during operation, wherein said capillary hollow spaces are leading to and adjoining the armature wear face and said armature is serving as a driver for the print element, where the armature is movable and positionable in a rapid sequence against the respective one of the pole wear faces of the respective magnet yoke and back into a rest position depending on actuating currents passing through the electromagnetic coil;
- a temperature-stable lubricant pressed at elevated temperature and pressure into the capillary hollow spaces.
Dependencies are inferred from the claim text.