Recording material charging apparatus and image forming apparatus

1. A recording material charging apparatus comprising:

a pre-transcription charging section arranged between a transcribing section that transcribes a toner image retained by a toner image retaining body on a recording material having concavity and convexity and a conveying section that conveys the recording material to the transcribing section and is arranged closest to the transcribing section, the pre-transcription charging section charging the recording material that is to be conveyed to the transcribing section;

a voltage supplying section that supplies voltage of a polarity opposite to a charging polarity of the toner image retained in the toner image retaining body to the pre-transcription charging section; and

a pre-transcription heating section that heats the recording material to be conveyed to the transcribing section, the pre-transcription heating section being arranged between the transcribing section and the conveying section (i) at a position opposed to the pre-transcription charging section or (ii) at a side of the conveying section rather than the pre-transcription charging section,

wherein the pre-transcription charging section and the pre-transcription heating section are configured so as to be able to move between the transcribing section and the conveying section along a conveying direction of the recording material.

2. The recording material charging apparatus according to claim 1 ,

wherein the pre-transcription charging section comprises a roll member that charges the recording material while contacting the recording material.

3. The recording material charging apparatus according to claim 2 ,

wherein the roll member has an elastic hardness of from about 15° to about 30° in ASKER C (SRIS 0101).

4. An image forming apparatus comprising:

the recording material charging apparatus according to claim 1 ;

the toner image retaining body that retains the toner image; and

the transcribing section that transcribes the toner image retained by the toner image retaining body on the recording material having concavity and convexity.

5. The recording material charging apparatus according to claim 1 ,

wherein the pre-transcription charging section and the pre-transcription heating section are configured so as to be able to move to a position that is separated from the recording material.

6. An image forming apparatus comprising:

the recording material charging apparatus according to claim 1 ;

the toner image retaining body that retains the toner image; and

the transcribing section that transcribes the toner image retained by the toner image retaining body on the recording material having concavity and convexity.

7. The image forming apparatus according to claim 6 ,

wherein the pre-transcription charging section and the pre-transcription heating section are configured so that a relation that μ1<μ2<μ3 is established in the case that a static friction coefficient between the pre-transcription charging section and the recording material is defined as μ1; a static friction coefficient between the pre-transcription heating section and the recording material is defined as μ2; and a static friction coefficient between the toner image retaining body and the recording material is defined as μ3.

8. The image forming apparatus according to claim 6 , further comprising:

a heat shielding member that prevents a heat from being transmitted from the pre-transcription heating section to the transcription section.

9. The image forming apparatus according to claim 6 ,

wherein the pre-transcription charging section is arranged on a position such that the recording material charged by the pre-transcription charging section maintains a potential not less than a predetermined potential of the recording material when the recording material is conveyed to an arrangement position of the transcribing section.

10. The image forming apparatus according to claim 6 , further comprising:

a shielding member that shields a space between the pre-transcription charging section and the toner image retaining body.