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Analysis of ink flow in a mimeograph printer based on the mechanics of fluid-filled poroelastic solids

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Summary

To understand some main ink flow mechanisms in a mimeograph printer, the continuum mechanics theory of fluid-saturated porous solids is applied to analyze the ink flow through screens and a printing master, which are modeled by a fluid-filled poroelastic single layer. The layer is assumed to be pressed by a press roller from below and to be subjected from above to the hydrodynamic lubrication pressure induced between a printing drum and an ink roller. Nonlinear elasticity of the layer and dependence of the permeability on its deformation are taken into account. The numerical results show some important results: e.g., squeezing-out of the ink from the layer by the layer compaction by the press roller plays an important role, especially for the case where the compression duration is small in comparison with the characteristic time of the ink-filled poroelastic layer.

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Author notes

  1. M. Mishima &  M. Kurashige

    Present address: Department of Mechanical Engineering, Iwate University, 020, Morioka, Japan

  2. H. Takasawa & T. Mori

    Present address: Division of R & D, Tohoku Ricoh Co., Shibata-cho 989-16, Miyagi-ken, Japan

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    1. M. Mishima
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    2. M. Kurashige
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    3. H. Takasawa
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    4. T. Mori
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    Mishima, M., Kurashige, M., Takasawa, H. et al. Analysis of ink flow in a mimeograph printer based on the mechanics of fluid-filled poroelastic solids. Acta Mechanica 127, 51–62 (1998). https://doi.org/10.1007/BF01170362

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    • DOI: https://doi.org/10.1007/BF01170362

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