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US 7,677,711 B2Granted
Ink-feeding device for ink-jet printing apparatus
AssigneeTapematic S.P.A.
InventorLuciano Perego
Life of this patent
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Abstract
An ink-feeding device for ink-jet printing apparatus comprises an ink-containing tank (2) and at least one print head (7) connected to the tank (2). The device further comprises a metering device (3) interposed between the tank (2) and the print head (7) and provided with an inner space (10) having a planar major extension to keep the pressure of the ink feeding the print head (7) substantially constant and to improve the print quality.
Claims19
An ink-feeding device for ink-jet printing apparatus, comprising:
- an ink-containing tank (2);
- at least one print head (7) connected to the tank (2),
- wherein it further comprises a metering device (3) interposed between the tank (2) and the print head (7) and having an inner space (10) with a prevailingly planar extension and a varying volume which is adapted to keep the pressure of the ink feeding the print head (7) substantially constant;
- wherein the metering device (3) comprises an upper wall (11a) consisting of a flexible membrane (12) and a lower wall (11b) consisting of a flexible membrane (12), said walls (11a, 11b) delimiting the inner space (10), each flexible membrane (12), in a non-deformed position, lying in a plane;
- wherein each of the flexible membranes (12) is deformable out of the respective plane between a first configuration, in which said walls (11a, 11b) are at a maximum mutual distance from each other and the varying volume is maximum, and a second configuration, in which said walls (11a, 11b) are at a minimum mutual distance from each other and the varying volume is minimum;
- wherein the metering device (3) further comprises a box-shaped case (20), said case (20) being provided with an inner chamber (21) inside which said flexible membranes (12) are housed;
- wherein said flexible membranes (12) are fastened to the case (20) by their edges (12a).
4 more elements
An ink-feeding device for ink-jet printing apparatus, comprising:
- an ink-containing tank (2);
- at least one print head (7) connected to the tank (2),
- wherein it further comprises a metering device (3) interposed between the tank (2) and the print head (7) and having an inner space (10) with a prevailingly planar extension which is adapted to keep the pressure of the ink feeding the print head (7) substantially constant;
- wherein the inner space (10) has a varying volume;
- wherein the inner space (10) is defined by walls (11) that are movable between a first position of maximum mutual distance and a second position of minimum mutual distance;
- wherein the movable walls (11) comprise an upper horizontal wall (11a) and a lower horizontal wall (11b);
- wherein the movable walls (11) consist of flexible membranes (12);
- wherein the metering device (3) further comprises a box-shaped case (20), said case (20) being provided with an inner chamber (21) inside which the membranes (12) are housed;
- wherein the case (20) comprises two closing plates (22) in superposed relationship with the membranes (12);
- wherein formed on each inner face (22a) of the plates (22) is a respective recessed portion (23) confining the inner chamber (21).
7 more elements
Dependencies are inferred from the claim text.