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US 4,730,821 AGranted
Device for separating prefolded, foldable sheets
AssigneeHasler AG
InventorDaniel Fluckiger
Life of this patent
Estimating the term…
Abstract
The device includes a side wall (13), which leaves open a slot (15) of a variable width relative to a support (11). The flaps of letter envelopes are inserted into the slot (15) angled at 90 degrees, where the letter envelopes rest in a stack on the support (11) and are maintained on their side by the side wall (13). Three sensors (36, 38, 39) serve to provide signals for a motor control of the position of the side wall. The side wall can be manually moved against the force of a spring (26).
Claims19
A device for isolating of prefolded, foldable sheet pieces comprising
- a support for placing a stack of sheet pieces, which support has a ledge joining the support at an edge;
- a sheet piece separator for serial removal of a lowest level sheet piece in each case;
- a side wall disposed opposite to the ledge and making an angle of more than about 60 degrees with a plane of the support for supporting and guiding the placed sheet pieces at a side of the sheet pieces, where a slot is formed between the ledge of the support and the side wall and where the width of the slot is adjustable and where the slot is adapted for receiving of prefolded sections of sheet pieces;
- an electromechanical drive means connected to the side wall for changing the width of the slot;
- a control system for actuating the electromechanical drive means;
- a first sensor disposed at the support and connected to the control system, where the first sensor responds to sheet pieces placed on the support;
- a second sensor disposed at the ledge of the support and connected to the control system, where the second sensor responds to a force directed against the plane of the ledge of the support;
- a third sensor disposed at the side wall and connected to the control system, where the third sensor responds to a motion of the side wall for expanding the slot;
- and
- a spring elastic connection between the electromechanical drive means and the side wall.
7 more elements
A method for isolating of prefolded, foldable sheet pieces comprising
- providing a support for placing a stack of sheet pieces, which support has a ledge joining the support at an edge at an angle of about 90 degrees;
- controlling the motion of a side wall disposed opposite to the ledge and making an angle of more than about 60 degrees with a plane of the support against the placed sheet pieces for supporting and guiding the placed sheet pieces at a side of the sheet pieces, with a control system for actuating an electromechanical drive based on a first sensor disposed at the support and connected to the control system, where the first sensor responds to sheet pieces placed on the support, a second sensor disposed at the ledge of the support and connected to the control system, where the second sensor responds to a force directed against the plane of the ledge of the support, and a third sensor disposed at the side wall and connected to the control system, where the third sensor responds to a motion of the side wall for expanding a slot formed between the ledge of the support and the side wall;
- actuating the side wall with the electromechanical drive connected to the side wall for changing the width of the slot against a spring elastic connection between the electromechanical drive and the side wall;
- moving the side wall such that the width of the slot formed between the ledge of the support and the side wall is adjustable and such that the slot is adapted for receiving of prefolded sections of sheet pieces;
- and
- serially removing a lowest level sheet piece in each case with a sheet piece separator.
3 more elements
Dependencies are inferred from the claim text.