Curved Guide Ribs Reduce Medium Scratching
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Solution Overview
Problem
Conventional medium transporting apparatuses cause rubbing or scratching of the medium against guide surfaces during transportation, which affects the smooth handling and quality of the medium.
Innovation Solution
The apparatus employs guide ribs and guide ribs with specific angled and curved surfaces that slope upward, minimizing contact pressure and preventing rubbing, along with a comb-like router for directing the medium, ensuring smooth transport and reducing friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the medium is pressed against the guide surface of the transporting guide, then the medium can be guided through the transport path, but the medium is rubbed or scratched by the guide surface
Solution Approach 1:
The guide surface is designed with a curved shape that slopes upward from the upstream side to the downstream side, rather than being flat. This curvature reduces the contact area between the medium and guide surface, minimizing rubbing and scratching while still providing effective guiding function through the transport path.
Solution Approach 2:
The guide surface has different properties at different locations - it slopes upward more steeply at the upstream side and becomes gentler toward the downstream side. This localized variation in slope angle optimizes both the guiding function and the reduction of harmful friction effects at different positions along the transport path.
2Device complexity
If a conventional transporting guide is used, then the structure is simple, but the medium experiences friction and damage during transport
Solution Approach 1:
Instead of a simple flat guide surface, the invention employs a curved guide surface that slopes upward. This adds some structural complexity but dramatically reduces friction and scratching of the medium, achieving better overall performance by prioritizing medium protection over structural simplicity.
Data Source
AI summary
A medium transporting apparatus includes a first transporting section (24) and first guide (27, 271). The first transporting section (24) transports a medium (P). The first guide (27, 271) guides the medium transported by the transporting section, and is disposed downstream of the first transporting section (24) with respect to a first direction in which the medium (P) is transported. The first guide (27, 271) includes a first guide portion (28) and a second guide portion (29, 291). The first guide portion extends in the first direction. The second guide portion (29, 291) extends in a second direction substantially perpendicular to the first direction.