Image forming apparatus

A hole punch for punching holes in paper delivered from an image forming apparatus, said hole punch comprising:

• a casing;
• a unit member pivotably mounted on said casing and pivotable to a position withdrawn from said casing;
• punching means within said unit member and including a plurality of punching cutters disposed at a predetermined interval in the width direction of the paper, a punching die for receiving said punching cutters and a collecting box having an opening thereinto at an upper portion thereof and disposed under said punching die to receive through the opening paper scraps made by punching holes in the paper and to store the paper scraps therein;
• and
• means on said unit member for maintaining the opening of said collecting box facing upward as said unit member is pivoted.

A hole punch for punching holes in paper delivered from an image forming apparatus, said hole punch comprising:

• punching means including a plurality of punching cutters disposed at a predetermined interval in the width direction of the paper, a punching die for receiving said punching cutters, pushing means for pushing said punching cutters toward said punching die;
• and a plurality of paper holders formed of a thin elastic plate and having leading edges elastically pressed on said punching die to guide the paper to said punching die;
• a casing covering said punching means and supporting said pushing means;
• and
• a unit member within said casing and housing said punching cutters and said punching die and adapted to be drawn out of said casing to separate said punching cutters from said pushing means.

A hole punch for punching holes in paper delivered from an image forming apparatus, said hole punch comprising:

• punching means including a plurality of punching cutters disposed at a predetermined interval in the width direction of the paper, a punching die for receiving said punching cutters, and pushing means for pushing said punching cutters toward said punching die;
• a casing covering said punching means;
• a unit member housing said punching cutters and said punching die while permitting said punching cutters and said punching die to be drawn out of said casing to separate said punching cutters from said pushing means, said unit member including a shaft pivotably mounting said unit member in said casing, while permitting said unit member to be drawn out of said casing;
• and
• adjustment means for adjusting the position of said unit member in the width direction of the paper thereby to adjust the position in the width direction of the paper at which said punching means punches holes in the paper, said adjustment means including means for moving said shaft in the width direction of the paper, thereby to move said unit member in the width direction of the paper.

A hole punch for use with an image forming apparatus, said hole punch comprising:

• detecting means for detecting the leading or the trailing edge of a paper as the paper is delivered by paper delivery means of the image forming apparatus;
• punching means for punching holes in the paper;
• discharge means for discharging the paper;
• and
• drive control means responsive to said detecting means for controlling said discharge means to halt said discharge means with the trailing portion of the paper at said punching means, for controlling said punching means to punch holes in the paper adjacent the trailing edge thereof with respect to the paper delivery direction, and after said punching means has punched the holes for restarting said discharge means so that the paper with holes punched therein is discharged, said drive control means including a timer responsive to a signal from said detecting means for halting said discharge means after a predetermined period of time, said timer including an adjustment means for adjusting the predetermined period of time, thereby altering the position of the punched holes in the longitudinal direction of the paper.

A hole punch for use with an image forming apparatus, said hole punch comprising:

• detecting means for detecting the leading or the trailing edge of a paper as the paper is delivered by paper delivery means of the image forming apparatus;
• punching means for punching holes in the paper;
• discharge means for discharging the paper;
• and
• drive control means responsive to said detecting means for controlling said discharge means to halt said discharge means with the trailing portion of the paper at said punching means, for controlling said punching means to punch holes in the paper adjacent the trailing edge thereof with respect to the paper delivery direction, and after said punching means has punched the holes for restarting said discharge means so that the paper with holes punched therein is discharged, said drive control means including a rotation member, a pulse generator for converting the rotation of said rotation member into pulses, and a pulse counter for counting the pulses and providing a signal upon counting of a predetermined number of pulses to halt said discharge means, said pulse counter including adjustment means for adjusting the predetermined number of pulses to adjust the timing of the halt of said discharge means, thereby altering the position of the punched holes in the longitudinal direction of the paper.

A hole punch for use with an image forming apparatus, said hole punch comprising:

• detecting means for detecting the leading or the trailing edge of a paper as the paper is delivered by paper delivery means of the image forming apparatus;
• punching means for punching holes in the paper, said punching means including a plurality of punching cutters disposed at a predetermined interval in the width direction of the paper, a punching die for receiving said punching cutters, and pushing means for pushing said punching cutters toward said punching die;
• a casing for supporting said pushing means and covering said punching means;
• a unit member within said casing and housing said punching cutters and said punching die and adapted to be drawn out of said casing to separate said punching cutters from said pushing means said unit member including pivotable mounting means pivotably mounting said unit member to said casing;
• a collecting box mounted under said punching die and in said unit member, said collecting box having an opening thereinto permitting said collecting box to receive paper scraps therein;
• and means for causing the opening of said collecting box always to face upward as said unit member is pivoted;
• discharge means for discharging the paper;
• and
• drive control means responsive to said detecting means for controlling said discharge means to halt said discharge means with the trailing portion of the paper at said punching means, for controlling said punching means to punch holes in the paper adjacent the trailing edge thereof with respect to the paper delivery direction, and after said punching means has punched the holes for restarting said discharge means so that the paper with holes punched therein is discharged.

A hole punch for punching holes in paper delivered from an image forming apparatus, said hole punch comprising:

• punching means including a plurality of punching cutters disposed at a predetermined interval in the width direction of the paper, a punching die for receiving said punching cutters, and pushing means for pushing said punching cutters toward said punching die;
• a casing covering said punching means and supporting said pushing means;
• and
• a unit member within said casing and housing said punching cutters and said punching die and adapted to be drawn out of said casing to separate said punching cutters from said pushing means;
• discharge means within said unit member for discharging the paper;
• and
• a collecting box mounted under said punching die and in said unit member, said collecting box having an opening thereinto permitting said collecting box to receive paper scraps made by punching holes in the paper and to store the paper scraps therein;
• said unit member including a main unit portion pivotably mounted on said casing and including said punching cutters, said punching die, and a first discharge roller;
• and a sub unit portion pivotably mounted on said main unit portion and including said collecting box and a second discharge roller, said first and second discharge rollers cooperating to form said discharge means.

A hole punch for punching holes in paper delivered from an image forming apparatus, said hole punch comprising:

• punching means including a plurality of punching cutters disposed at a predetermined interval in the width direction of the paper, a punching die for receiving said punching cutters, and pushing means for pushing said punching cutters toward said punching die;
• a casing covering said punching means and supporting said pushing means;
• and
• a unit member within said casing and housing said punching cutters and said punching die and adapted to be drawn out of said casing to separate said punching cutters from said pushing means;
• discharge means within said unit member for discharging the paper;
• and
• a collecting box mounted under said punching die and in said unit member, said collecting box having an opening thereinto permitting said collecting box to receive paper scraps made by punching holes in the paper and to store the paper scraps therein;
• said unit member including a main unit portion pivotably mounted on said casing and including said punching cutters and said punching die;
• and a sub unit portion pivotably mounted on said main unit portion and including said collecting box and said discharge means.

A hole punch for punching holes in paper delivered from an image forming apparatus, said hole punch comprising:

• punching means including a plurality of punching cutters disposed at a predetermined interval in the width direction of the paper, a punching die for receiving said punching cutters, and pushing means for pushing said punching cutters toward said punching die;
• a casing covering said punching means and supporting said pushing means;
• a unit member within said casing and housing said punching cutters and said punching die and adapted to be drawn out of said casing to separate said punching cutters from said pushing means;
• means mounting said unit member on said casing while permitting said unit member to be drawn out of said casing, said mounting means comprising a shaft pivotably mounting said unit member in said casing and permitting said unit member to be pivoted and drawn out of said casing;
• and
• adjustment means for adjusting the position of said unit member in the width direction of the paper, thereby to adjust the position at which said punching means punches holes in the paper, said adjustment means comprising means for moving said shaft in the width direction of the paper, thereby to move said unit member in the width direction of the paper.

A hole punch for punching holes in paper delivered from an image forming apparatus, said hole punch comprising:

• punching means including a plurality of punching cutters disposed at a predetermined interval in the width direction of the paper, a punching die for receiving said punching cutters, and pushing means for pushing said punching cutters toward said punching die;
• a casing covering said punching means and supporting said pushing means;
• and
• a unit member within said casing and housing said punching cutters and said punching die and adapted to be drawn out of said casing to separate said punching cutters from said pushing means, said unit member including a collecting box mounted under said punching die and having an opening thereinto permitting said collecting box to receive paper scraps made by punching holes in the paper and to store the paper scraps therein;
• means pivotably mounting said unit member on said casing, to permit said unit member to be drawn out from said casing by pivoting of said unit member;
• and
• means for maintaining the opening of said collecting box facing upward as said unit member is pivoted.