Patent ID: 7828291
Filing Date: 2010-11-09
Classification: B65H

Abstract:
1. A conveying mechanism comprising: a pair of conveying rollers which conveys a paper-like medium; a conveying guide which guides the paper-like medium to the conveying rollers; and a conveying housing which defines a conveying path along which the paper-medium is conveyed, a first bulging space and a second bulging space being provided on a downstream side and an upstream side, respectively, of the conveying path, the second bulging space having a length L 1 along the conveying path, the conveying path between the first and second bunging spaces being defined to have a length L 2 , the lengths L 1 and L 2 satisfying a relationship expressed by Formula 1, wherein in Formulas 1 and 2, c denotes sound velocity, and f denotes a frequency of possible noise propagating through the conveying path and corresponds to a central frequency of a frequency band of noise to be attenuated in the conveying housing.