Liquid degassing system and liquid degassing method
AssigneeFuji Photo Film Co., Ltd.
InventorKenji Hayashi
Life of this patent
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Abstract
A degassing device capable of regulating an amount of air dissolved in a liquid. A device for measuring amounts of dissolved oxygen measures the amount of oxygen dissolved in one of a coating liquid which has yet to be degassed, and is to be fed to a film degassing device, and a coating liquid which has been degassed and discharged from the film degassing device. Based on measured results, a control unit regulates the degree of opening of a vacuum valve so as to change the degree of degassing performed by the film degassing device, thereby suppressing fluctuations in an amount of oxygen dissolved in the coating liquid. A load never constantly acts on the film all the time, the film life can accordingly be extended, thus resulting in reductions in running costs.
Claims20
A liquid degassing system comprising:
- a degassing device for removing air dissolved in a liquid by feeding the liquid thereinto, degassing the liquid, and discharging the liquid therefrom;
- a detecting device for detecting an amount of air dissolved in at least one of a liquid which is to be fed to the degassing device and a liquid which has been discharged from the degassing device;
- a degassing regulating unit for regulating an amount of dissolved air degassed by the degassing device;
- and
- a control unit for controlling the degassing regulating unit, based on detection results obtained by the detecting device, thereby regulating a degree of degassing performed by the degassing device.
A liquid degassing system comprising:
- a group of degassing devices arranged in rows, each of the group of degassing devices having a liquid providing flow path for providing thereto a liquid which is to be degassed and a liquid discharge flow path for discharging therefrom a liquid which has been degassed;
- a detecting device for detecting an amount of air dissolved in at least one of the liquid which is to be fed to the group of degassing devices and the liquid which has been discharged from the group of degassing devices;
- a switching device for switching providing the liquid to at least one degassing device from among the group of degassing devices;
- and
- a control unit for operating the switching device based on detection results obtained by the detecting device, thereby providing the liquid to at least one degassing device selected by the switching device.
A liquid degassing method for degassing air dissolved in a liquid which is to be coated on a web, the method comprising:
- preparing a degassing device;
- feeding a liquid to the degassing device and discharging the liquid therefrom;
- detecting an amount of air dissolved in at least one of the liquid which is to be fed to the degassing device and the liquid which has been discharged from the degassing device;
- and
- regulating a degree of degassing performed by the degassing device, based on detection results.
Dependencies are inferred from the claim text.