An image forming apparatus

Claim 2

An image forming apparatus (1) comprising a media cartridge (6) that accommodates a roll of a light receiving sheet (61) , a leader sheet (62) for automatic loading being connected to the leading edge of said light receiving sheet (61) , characterised by sensitivity information recording means (67) , provided on the leader sheet (62) , for recording information relating to the sensitivity of the light receiving sheet (61) for the formation of a full colour image, a sensitivity information sensor (20) to read the sensitivity information recorded on the sensitivity information recording means (67) , and a colour correcting means (31,32) for correcting colours according to the sensitivity information read by the sensitivity information sensor (20) .

Claim 3

An image forming apparatus according to claim 1, wherein said leader sheet (62) is made of a shading material.

Claim 4

An image forming apparatus according to claim 2, wherein said sensitivity information is given by punched holes or light transmitting holes (67) that are formed in said leader sheet (62 ), said holes indicating the sensitivity values that are specific to said light receiving sheet (61) .

Claim 5

An image forming apparatus according to any of claims 1 to 3, wherein said sensitivity information sensor (20 ) comprises a light emitting element (20a) and a light detecting element (20b) .

Claim 6

An image forming apparatus according to any of claims 1 to 4, wherein said colour correcting means comprises first and second colour correction filters (31,32) that are movably disposed along a light path in a parallel manner to face each other, a movable diaphragm (33) that is disposed between said two colour correction filters, fixed diaphragms (34,35) that are disposed respectively outside of said colour correction filters, and stepping motor means (38,39) that are connected to said colour correction filters (31,32) so that said colour correction filters are independently moved in the longitudinal direction, said first colour filter (31) being provided with a red light-absorbing filter (31a) on one edge, a colourless, transparent portion (31b) in the middle, and a green light-absorbing filter (31c) on the other edge, and said second colour correction filter (32) being provided with a green light-absorbing filter (32a) in one edge, a colourless, transparent portion (32b) in the middle, and a blue light-absorbing filter (32c) on the other edge, wherein by controlling said stepping motor means (38,39) to move said two colour correction filters (31,32) , the insertion amount of these red, green and blue light-absorbing filters into said light path is changed to thereby carry out stepless colour corrections.