Optical recording head and belt positioning apparatus

An optical recording apparatus comprising:

• an endless belt-shaped imaging member having a first surface on which an image is to be formed and a second surface which is opposite to said first surface;
• means for advancing said imaging member along a predetermined path;
• means for uniformly applying charge to said first surface of said imaging member;
• an optical recording head disposed downstream of said charge applying means with respect to the direction of advancement of said imaging member, said optical recording head applying light containing image information to said uniformly charged first surface of said imaging member along an image exposure line thereby causing said charge to dissipate selectively to form an electrostatic latent image thereon;
• a back-up member supported to be movable between an advanced position where said back-up member is pressed against said second surface of said imaging member generally in parallel with said image exposure line and a retracted position where said back-up member is not pressed against said imaging member;
• and
• first urging means for urging said back-up member into said advanced position thereby preventing that portion of said imaging member which is located generally at said image exposure line from moving in a direction generally normal to the advancing direction of said imaging member;
• and
• stopper means provided at a bottom of said optical recording head wherein said back-up member is provided with a pair of bearings on both ends so that said back-up member is set in said advanced position when said bearings are brought into contact with said stopper means by means of said first urging means.

An optical recording head for applying light containing image information to an imaging member to form an electrostatic latent image thereon, comprising:

• first supporting means for supporting a lens array comprised of a plurality of lenses;
• second supporting means for supporting a light-emitting array comprised of a plurality of light-emitting diodes;
• first adjusting means for adjusting a distance between said first and second supporting means;
• third supporting means including a first reference means for locating said third supporting means in a desired position through engagement with a second reference means provided in a stationary object;
• second adjusting means for adjusting a distance between said second and third supporting means;
• and
• channel means for slidingly engaging said second reference means into engagement with said stationary object.

An optical recording head for applying light containing image information to an imaging member to form an electrostatic latent image thereon, comprising:

• first supporting means for supporting a lens array comprising of a plurality of lenses;
• second supporting means for supporting a light-emitting array comprised of a plurality of light-emitting diodes;
• first adjusting means for adjusting a distance between said first and second supporting means;
• a deformable seal member interposed between said first and second supporting means, said seal member being provided with an opening allowing light emitted from said light-emitting array to pass through said opening to said lens array;
• and
• channel means for slidingly engaging the optical recording head into engagement with a stationary object.

An optical recording head for applying light containing image information onto a uniformly charged imaging member to form an electrostatic latent image by having the charge selectively dissipated by the light applied thereto, comprising:

• a light source for emitting said light containing image information;
• a focusing element for focusing said light emitted from said light source onto said imaging member;
• and
• an electrically insulating brush fixedly attached around said focusing element and extending downward over a predetermined distance from said focusing element with the brush's tip end in contact with said imaging member thereby enclosing a space defined between said focusing element and said imaging member by said brush.