Recording medium post-processing apparatus, printer unit with the same, recording medium post-processing method, and non-transitory computer-readable medium storing recording medium post- processing instructions

A recording medium post-treatment method of a recording medium post-processing apparatus which comprises (i) a stacker configured to be stacked with a plurality of sheet-like recording media with images being recorded thereon, (ii) an alignment device configured to apply an external force to the plurality of recording media stacked on the stacker so as to align the plurality of recording media stacked on the stacker, and (iii) a receiver configured to receive a kind of a currently-stacked-recording-media that is a plurality of recording media being currently stacked on the stacker, comprising:

• a step of setting a reference number to a first value when a kind of the currently-stacked-recording-media is a first kind of the recording media;
• a step of setting the reference number to a second value when a kind of the currently-stacked-recording-media is a second kind of the recording media, the second value being less than the first value, a friction coefficient of the second kind of the recording media being larger than that of the first kind of the recording media;
• a step of obtaining a number of a currently-stacked-recording-media;
• and
• a step of controlling the alignment device to apply the external force to the currently-stacked-recording media when the number of the currently-stacked-recording-media reaches the reference number.

A non-transitory, computer-readable medium storing computer-readable instructions therein that, when executed by a processor of a recording medium post-processing apparatus which comprises (i) a stacker configured to be stacked with a plurality of sheet-like recording media with images being recorded thereon, (ii) an alignment device configured to apply an external force to the plurality of recording media stacked on the stacker so as to align the plurality of recording media stacked on the stacker, and (iii) a receiver configured to receive a kind of a currently-stacked-recording-media that is a plurality of recording media being currently stacked on the stacker, cause the recording medium post-processing apparatus to perform the steps of:

• setting a reference number to a first value when a kind of the currently-stacked-recording-media is a first kind of the recording media;
• setting the reference number to a second value when a kind of the currently-stacked-recording-media is a second kind of the recording media, the second value being less than the first value, a friction coefficient of the second kind of the recording media being larger than that of the first kind of the recording media;
• obtaining a number of a currently-stacked-recording-media;
• controlling the alignment device to apply the external force to the currently-stacked-recording media when the number of the currently-stacked-recording-media reaches the reference number.

A recording medium post-processing apparatus comprising:

• a stacker configured to be stacked with a plurality of sheet-like recording media with images being recorded thereon;
• an alignment device configured to apply an external force to the plurality of recording media stacked on the stacker so as to align the plurality of recording media stacked on the stacker, a magnitude of the external force being a reference value;
• a receiver configured to receive a kind of a currently-stacked-recording-media that is a plurality of recording media being currently stacked on the stacker;
• and
• a controller configured to:
• set a reference number to a first value when a kind of the currently-stacked-recording-media is a first kind of the recording media;
• set the reference number to a second value when a kind of the currently-stacked-recording-media is a second kind of the recording media, the second value being less than the first value, a friction coefficient of the second kind of the recording media being larger than that of the first kind of the recording media;
• obtain a number of a currently-stacked-recording-media;
• and
• control the alignment device to apply a first external force to the currently-stacked-recording media when the number of the currently-stacked-recording-media reaches the reference number.