Print head pressure contact device

Claim 2

A print head pressure contact device for use in a printer comprising a head holder (3) for holding a print head (4); a platen (24) for supporting a medium (25) to be printed; and resilient means (6) for urging the head holder (3) and the platen (24) relatively towards each other characterised in that the head holder (3) is pivotally mounted on a lever (2) which is itself pivotally mounted on a head carrier (1) whereby good printing contact may be maintained between the print head (4) and the medium (25).

Claim 3

A device as claimed in claim 1 characterised in that the resilient means comprises a spring (6) which acts between the head carrier (1) and the lever (2), the platen (24) being a fixed member.

Claim 4

A device as claimed in claim 2 characterised in that the head holder (3) is pivotally mounted on a spindle (23) carried by the said lever (2), the axis of the spring (6) passing through the spindle (23).

Claim 6

A device as claimed in claim 2 or 3 characterised in that the head carrier (1) is slidably mounted in a frame (5), drive means (10) being provided for effecting movement of the head carrier (1) in the frame (5).

Claim 7

A print head pressure contact device comprising: a head carrier (1) having a head carrier driving pin (10) engaging with a head carrier transfer spindle (7) extending through a lateral hole (21) formed in said head carrier (1), the head carrier (1) being adapted to be moved while being guided by guide members (8,9) fitted to a frame (5), a head pressure contact lever (2) rotatably attached to a first spindle (22) fitted to said head carrier (1), a spring (6) fitted at one end thereof in a groove (6 a ) provided in said head carrier (1) and at its other opposing end in a groove (6 b ) provided on the top side of said head pressure contact lever (2), a head holder (3) rotatably attached to a second spindle (23) fitted to said head pressure contact lever (2), for holding a print head thereon, and a platen (24) attached to said frame (26) for holding a material to be printed.

Claim 8

A print head pressure contact device comprising: a head carrier (1) having a head carrier driving pin (10) engaging with a head carrier transfer spindle (7) extending through a lateral hole (21) formed in said head carrier (1), the head carrier (1) being adapted to be moved while being guided by guide members (8,9) fitted to a frame (5), a head pressure contact lever (2) rotatably attached to a first spindle (22) fitted to said head carrier (1), a spring (6) fitted at one end thereof in a groove (6 a ) provided in said head carrier (1) and at its other opposing end in a groove (6 b ) provided on the top side of said head pressure contact lever (2), a head holder (3) rotatably attached to a second spindle (23) fitted to said head pressure contact lever (2), for holding a print head thereon, and a platen (24) attached to said frame (26) for holding a material to be printed.