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US 5,181,709 AGranted
Sheet feeding apparatus
AssigneeSharp Kabushiki Kaisha
InventorsKenji Okada, Toyoaki Namba
Life of this patent
Estimating the term…
Abstract
Recording papers stacked up on a tray are conveyed as being attracted in vacuum by the conveying belt located above or beneath. To convey the recording papers one by one, air flow is blown to the front edge of the recording papers to separate. Accordingly, plural nozzles are disposed in the widthwise direction of the recording paper, and the air flows from the nozzles are directed to converge at the upstream side in the conveying direction front the front edges of the recording papers. By setting this converging position near the both ends in the widthwise direction of the recording papers, the recording papers may be separated securely and stably.
Claims41
A sheet feeding apparatus comprising:
- (a) a laying plate having a centerline running in a feeding direction for receiving a stack of sheets,
- (b) a feeding means for feeding a sheet to be fed from the stack, the feeding means located adjacent to the position of the sheet to be fed and
- (c) an air stream forming means disposed at the downstream side in the feeding direction for injecting a plurality of air flows between the sheets from plural positions in directions directed outwardly from the centerline of the laying plate and in directions toward the feeding means and in directions toward the position of sheets in the laying plate, the air flows between the sheets being concentrated at the upstream side in the feeding direction of the sheets.
A sheet feeding apparatus comprising:
- (a) a laying plate having a centerline running in a feeding direction for receiving a stack of sheets and having deforming parts for deforming the sheets plural positions in a direction outwardly from the centerline,
- (b) a feeding means for vacuum feeding a sheet to be fed from the stack, the feeding means located adjacent to the position of the sheet to be fed and
- (c) an air stream forming means, disposed at the downstream side in the feeding direction of the laying plate, for injecting a plurality of air flows between the sheets from plural positions in directions directed outwardly from the centerline of the laying plate and in directions toward the deforming parts.
A sheet feeding apparatus comprising:
- a laying plate for receiving a stack of sheets and having a centerline running in a feeding direction and having a nearly horizontal central laying part and lateral laying parts extending from boundaries along both of the sides of the central laying part that are outward from the centerline of the laying plate and are parallel to the feeding direction, the central laying part and the lateral laying parts each having end parts at the downstream side in the feeding direction,
- the laying plate having an end part at the downstream side in the feeding direction of the central laying part being upstream in the feeding direction from end parts at the downstream side in the feeding direction of the lateral laying parts thereby forming a notch in the laying plate, and
- a feeding means for feeding a bottom sheet of the stack of sheets located in sufficient proximity to the notch to enable vacuum feeding of the bottom sheet, and
- the air flow forming means provides a plurality of air flows toward the boundaries of the central laying part and the lateral laying parts of the laying plate.
1 more element
A sheet feeding apparatus comprising:
- (a) a laying plate for receiving a stack of sheets and having a centerline running in a feeding direction and having a nearly horizontal central laying part and lateral laying parts extending from boundaries along both of the sides of the central laying part that are outward from the centerline of the laying plate and are parallel to the feeding direction, the central laying part and the lateral laying parts each having end parts at the downstream side in the feeding direction, and having deforming parts for deforming the sheets at plural positions in a direction outwardly from the centerline,
- the laying plate having an end part at the downstream side in the feeding direction of the central laying part being upstream in the feeding direction from end parts at the downstream side in the feeding direction of the lateral laying parts thereby forming a notch in the laying plate, and
- a feeding means for feeding a bottom sheet of the stack of sheets located in sufficient proximity to the notch to enable vacuum feeding of the bottom sheet, and
- the air flow forming means provides a plurality of air flows toward the boundaries of the central laying part and the lateral laying parts of the laying plate and between the sheets from plural positions in directions directed outwardly from the centerline of the laying plate and in directions toward the deforming parts.
1 more element
Dependencies are inferred from the claim text.