Laser processing apparatus

A laser processing apparatus comprising:

• a feeding mechanism configured to feed an electrode sheet to be applied with laser processing in a feeding direction;
• a laser irradiation mechanism configured to apply laser processing to the electrode sheet by irradiating laser beam to a first surface of the electrode sheet which is fed by the feeding mechanism;
• and
• a dust collection mechanism including a dust collection hood covering laser processing points of the electrode sheet from a first-surface side of the electrode sheet to collect dust by discharging air contained in a region surrounded by the dust collection hood and the electrode sheet,
• wherein
• the feeding mechanism includes at least one feeding roller configured such that the electrode sheet is wound around an outer circumferential surface of the at least one feeding roller to feed the electrode sheet in the feeding direction,
• at least one imaginary contact plane surface, which is in contact with the first surface of the electrode sheet at the respective laser processing points generated on the electrode sheet by the laser irradiation mechanism, is determined as a boundary,
• a region on a side where the electrode sheet is contacted with the imaginary contact plane surface is defined as a first region and a region on an opposite side is defined as a second region,
• a peripheral edge of an opening portion of the dust collection hood has a curved shape as seen in a cross-sectional view of the dust collection hood, the cross-sectional view being taken in a laser beam direction along which the laser beam is irradiated to the first surface of the electrode sheet, and
• an entirety of the curved shape of the peripheral edge is positioned in the first region with respect to the imaginary contact plane surface.