Sheet conveying system

A sheet transmission system, comprising:

• a sheet stacking unit, a sheet position adjusting unit, a sheet processing unit, and a sheet collection unit, each unit arranged in series along a transmission path of a sheet;
• and one or more independent transmission units, each transmission unit provided between two adjacent units among above units;
• wherein the sheet stacking unit is configured to store the sheet to be processed;
• the sheet position adjusting unit is configured to adjust the position of the sheet;
• the sheet processing unit is configured to conduct a predetermined process to the sheet transmitted therein;
• the sheet collection unit is configured to collect the processed sheet;
• wherein each said transmission unit is configured to conduct reciprocating-linear movement between two adjacent units along the transmission path of the sheet, and to transmit the sheet between two adjacent units;
• wherein the transmission path of the sheet comprises a first direction-a second direction orthogonal to the first direction a first-direction transmission state in which the sheet is transmitted along the first direction between two adjacent units and a second-direction transmission state in which the sheet is transmitted along the second direction between two adjacent units;
• wherein when a sheet is transmitted along the transmission path, the sheet is subjected to at least one transition between the first-direction transmission state and the second-direction transition state;
• and
• wherein the sheet will not deflect in a vertical direction.