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1. WO1996039299 - DOT MATRIX PRINT HEAD WITH BIDIRECTIONAL CAPABILITY

Publication Number WO/1996/039299
Publication Date 12.12.1996
International Application No. PCT/US1996/006474
International Filing Date 07.05.1996
Chapter 2 Demand Filed 17.12.1996
IPC
B41J 2/235 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
2Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
22characterised by selective application of impact or pressure on a printing material or impression- transfer material
23using print wires
235Print head assemblies
B41J 2/255 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
2Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
22characterised by selective application of impact or pressure on a printing material or impression- transfer material
23using print wires
235Print head assemblies
25Print wires
255Arrangement of the print ends of the wires
B41J 2/285 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
2Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
22characterised by selective application of impact or pressure on a printing material or impression- transfer material
23using print wires
27Actuators for print wires
285of plunger type
CPC
B41J 2/235
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, ; e.g. INK-JET PRINTERS, THERMAL PRINTERS; , i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
2Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
22characterised by selective application of impact or pressure on a printing material or impression-transfer material
23using print wires
235Print head assemblies
B41J 2/255
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, ; e.g. INK-JET PRINTERS, THERMAL PRINTERS; , i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
2Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
22characterised by selective application of impact or pressure on a printing material or impression-transfer material
23using print wires
235Print head assemblies
25Print wires
255Arrangement of the print ends of the wires
B41J 2/285
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, ; e.g. INK-JET PRINTERS, THERMAL PRINTERS; , i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
2Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
22characterised by selective application of impact or pressure on a printing material or impression-transfer material
23using print wires
27Actuators for print wires
285of plunger type
Applicants
  • DH TECH [US]/[US]
Inventors
  • GROENKE, Jeffery
Agents
  • McCLAIN, James, W.
Priority Data
08/468,64306.06.1995US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DOT MATRIX PRINT HEAD WITH BIDIRECTIONAL CAPABILITY
(FR) TETE D'IMPRIMANTE A MATRICE D'IMPRESSION PAR POINTS AVEC UNE CAPACITE BIDIRECTIONNELLE
Abstract
(EN)
A print head is disclosed which has a printwire output pattern in which the printing ends of the printwires are in an NxN matrix and no printing end occupies the same vertical position, or normally also the same horizontal position, in the matrix as any other printing end. The printwires may be arrayed in polygonal, diamond, oval or circular output patterns, and the array width and height will be equal or generally similar in extent. This output pattern allows printing in two orthogonal directions and has many known advantages of the diamond pattern. Bi-directional printing can be done in either the vertical or horizontal direction because each printwire is on a separate grid line in both directions. This print head is superior in heat dissipation because the coils are placed near the outside diameter. The coils can be potted directly to the heat sink with no other structure in the heat dissipation path. The outside coil location also gives the most physical space for the coil winding. The armature pivot and the magnetic gap are both located at the outside pole. Measured from the pivot, the ratio of the plunger location to the printwire location gives a long stroke. This head increases the flexibility of printer design by providing a snap-in ribbon guide. This head is designed to be mass produced and to be highly adaptable to different printer applications. A method of dot matrix printing with this print head is also disclosed.
(FR)
L'invention porte sur une tête d'impression qui a un motif de sortie constitué de fils métalliques d'impression, où les extrémités d'impression des fils métalliques d'impression forment une matrice NxN et aucune extrémité d'impression n'occupe la même position verticale, ni, normalement, la même position horizontale dans la matrice qu'une autre extrémité d'impression. Les fils d'impression peuvent être disposés selon un motif polygonal, en losange, ovale ou circulaire et la largeur du dispositif sera généralement égale à sa hauteur. Ce motif de sortie permet une impression dans deux directions orthogonales et présente plusieurs des avantages connus des motifs en losange. Une impression bidirectionnelle peut être réalisée soit dans la direction verticale, soit dans la direction horizontale, parce que chaque fil métallique d'impression est sur une ligne de réseau séparée dans les deux directions. La tête d'impression permet une dissipation de chaleur améliorée parce que les bobines sont placées près du diamètre externe. Les bobines peuvent être posées directement sur le puits à chaleur, sans autre structure dans le trajet de dissipation de la chaleur. La localisation externe de la bobine assure également le maximum de place à l'enroulement de la bobine. Le pivot de l'induit et l'espace magnétique sont tous deux situés au niveau du pole externe. Mesuré à partir du pivot, le rapport de la distance au piston sur la distance au fil d'impression permet une longueur de course importante. Un guide à ruban encliquetable augmente la flexibilité d'emploi de la tête d'impression. Cette tête d'impression est conçue pour être produite à grande échelle et pour être très adaptable à différentes applications. L'invention concerne également un procédé d'impression utilisant la tête à matrice d'impression par points décrite.
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