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US 2015/0153710 A1Published application
Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorYuya Otsuka
Life of this patent
Estimating the term…
Abstract
An image forming apparatus includes: an image forming portion; a first housing; a fixing device; a second housing; a first opening of the first housing facing a space, a second opening of the second housing facing the space; a first air supply fan that supplies air from the outside, a first air discharge fan that discharges air from the inside, a second air supply fan that supplies air from the outside, and a second air discharge fan that discharges air from the inside. The first housing and the second housing communicate with the atmosphere through the first and second openings, respectively. When an air pressure of in the first opening of the first housing is P1 and an air pressure of in the second opening of the second housing is P2, a relation of P2<P1 is satisfied.
Claims21
An image forming apparatus comprising:
- an image forming portion that forms an image on a recording material;
- a first housing that covers the image forming portion;
- a fixing device that fixes the image formed on the recording material;
- a second housing that is disposed to face the first housing at outward of the first housing so as to cover the fixing device;
- a first opening formed in the first housing in order to convey the recording material from the first housing to the second housing;
- a second opening formed in the second housing so as to face the first opening in order to convey the recording material from the first housing to the second housing;
- a first air supply and discharge device including at least one of a first air supply device that is provided in the first housing so as to supply air into the first housing from the outside and a first air discharge device that is provided in the first housing so as to discharge air from an inside of the first housing to the outside;
- and
- a second air supply and discharge device including at least one of a second air supply device that is provided in the second housing so as to supply air into the second housing from the outside and a second air discharge device that is provided in the second housing so as to discharge air from an inside of the second housing to the outside, wherein
- the first housing and the second housing communicate with the atmosphere through the first and second openings, respectively, and
- when an absolute pressure of a wind pressure of air in the first opening of the first housing is P1 [Pa (abs)] and an absolute pressure of a wind pressure of air in the second opening of the second housing is P2 [Pa (abs)], a relation of P2<P1 is satisfied at least during an image forming operation.
8 more elements
An image forming apparatus comprising:
- an image forming portion that forms an image on a recording material;
- a first housing that covers the image forming portion;
- a fixing device that fixes the image formed on the recording material;
- a second housing that is disposed to face the first housing at outward of the first housing so as to cover the fixing device;
- a first opening formed in the first housing in order to convey the recording material from the first housing to the second housing;
- a second opening formed in the second housing so as to face the first opening in order to convey the recording material from the first housing to the second housing;
- a first air supply and discharge device including at least one of a first air supply device that is provided in the first housing so as to supply air into the first housing from the outside and a first air discharge device that is provided in the first housing so as to discharge air from an inside of the first housing to the outside;
- and
- a second air supply and discharge device including at least one of a second air supply device that is provided in the second housing so as to supply air into the second housing from the outside and a second air discharge device that is provided in the second housing so as to discharge air from an inside of the second housing to the outside, wherein
- the first housing and the second housing communicate with the atmosphere through the first and second openings, respectively, and
- when an absolute pressure of a static pressure of an atmospheric pressure is P [Pa (abs)] and an absolute pressure of a wind pressure of air in the second opening of the second housing is P2 [Pa (abs)], a relation of P2<P is satisfied at least during an image forming operation.
8 more elements
An image forming apparatus comprising:
- an image forming portion that forms an image on a recording material;
- a first housing that covers the image forming portion;
- a fixing device that fixes the image formed on the recording material;
- a second housing that is disposed to face the first housing at outward of the first housing so as to cover the fixing device;
- a first opening formed in the first housing in order to convey the recording material from the first housing to the second housing;
- a second opening formed in the second housing so as to face the first opening in order to convey the recording material from the first housing to the second housing;
- a first air supply and discharge device including at least one of a first air supply device that is provided in the first housing so as to supply air into the first housing from the outside and a first air discharge device that is provided in the first housing so as to discharge air from an inside of the first housing to the outside;
- and
- a second air supply and discharge device including at least one of a second air supply device that is provided in the second housing so as to supply air into the second housing from the outside and a second air discharge device that is provided in the second housing so as to discharge air from an inside of the second housing to the outside, wherein
- the first housing and the second housing communicate with the atmosphere through the first and second openings, respectively, and
- when a volume of air passing through the first opening from the inside to the outside of the first housing is V′1 [m3/min], a volume of air passing through the second opening from the inside to the outside of the second housing is V′2 [m3/min], an area of the first opening is S1 [m2], and an area of the second opening is S2 [m2], relations of V′1/S1>V′2/S2 are satisfied at least during an image forming operation.
8 more elements
An image forming apparatus comprising:
- an image forming portion that forms an image on a recording material;
- a first housing that covers the image forming portion;
- a fixing device that fixes the image formed on the recording material;
- a second housing that is disposed to face the first housing at outward of the first housing so as to cover the fixing device;
- a first opening formed in the first housing in order to convey the recording material from the first housing to the second housing;
- a second opening formed in the second housing so as to face the first opening in order to convey the recording material from the first housing to the second housing;
- a first air supply and discharge device including at least one of a first air supply device that is provided in the first housing so as to supply air into the first housing from the outside and a first air discharge device that is provided in the first housing so as to discharge air from an inside of the first housing to the outside;
- and
- a second air supply and discharge device including at least one of a second air supply device that is provided in the second housing so as to supply air into the second housing from the outside and a second air discharge device that is provided in the second housing so as to discharge air from an inside of the second housing to the outside, wherein
- the first housing and the second housing communicate with the atmosphere through the first and second openings, respectively, and
- when a volume of air supplied by the second air supply device is V2 [m3/min] and a volume of air discharged by the second air discharge device is v2 [m3/min], a relation of V2−v2<0 is satisfied.
8 more elements
An image forming apparatus comprising:
- an image forming portion that forms an image on a recording material;
- a first housing that covers the image forming portion;
- a fixing device that fixes the image formed on the recording material;
- a second housing that is disposed to face the first housing at outward of the first housing so as to cover the fixing device;
- a first opening formed in the first housing in order to convey the recording material from the first housing to the second housing;
- a second opening formed in the second housing so as to face the first opening in order to convey the recording material from the first housing to the second housing;
- a first air supply and discharge device including at least one of a first air supply device that is provided in the first housing so as to supply air into the first housing from the outside and a first air discharge device that is provided in the first housing so as to discharge air from an inside of the first housing to the outside;
- and
- a second air supply and discharge device including at least one of a second air supply device that is provided in the second housing so as to supply air into the second housing from the outside and a second air discharge device that is provided in the second housing so as to discharge air from an inside of the second housing to the outside, wherein
- when an absolute pressure of a wind pressure of air in the first opening of the first housing is P1 [Pa (abs)] and an absolute pressure of a wind pressure of air in the second opening of the second housing is P2 [Pa (abs)], a relation of P1>P2 is satisfied at least during an image forming operation.
7 more elements
An image forming apparatus comprising:
- an image forming portion that forms an image on a recording material;
- a first housing that covers the image forming portion;
- a fixing device that fixes the image formed on the recording material;
- a second housing that is disposed to face the first housing at outward of the first housing so as to cover the fixing device;
- a first opening formed in the first housing in order to convey the recording material from the first housing to the second housing;
- a second opening formed in the second housing so as to face the first opening in order to convey the recording material from the first housing to the second housing;
- a first air supply and discharge device including at least one of a first air supply device that is provided in the first housing so as to supply air into the first housing from the outside and a first air discharge device that is provided in the first housing so as to discharge air from an inside of the first housing to the outside;
- and
- a second air supply and discharge device including at least one of a second air supply device that is provided in the second housing so as to supply air into the second housing from the outside and a second air discharge device that is provided in the second housing so as to discharge air from an inside of the second housing to the outside, wherein
- when a volume of air passing through the first opening from the inside to the outside is V′1 [m3/min], a volume of air passing through the second opening from the inside to the outside is V′2 [m3/min], an area of the first opening is S1 [m2], and an area of the second opening is S2 [m2], a relation of V′1/S1>V′2/S2 is satisfied at least during an image forming operation.
7 more elements
Dependencies are inferred from the claim text.