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US 4,408,438 AGranted
Process and apparatus for pressing, packing and hooping fibrous material in bale form
AssigneeHoechst Aktiengesellschaft
InventorSiegfried Rewitzer
Life of this patent
Estimating the term…
Abstract
The invention relates to a process and to apparatus for packing fibrous material in bales of high density, the material being pressed together in a final press and then being moved, together with the press-ram end piece and bottom plate, while still standing under pressure, out of the press compartment to further working positions where it is packed and reinforced. The invention enables the bales to be packed outside the press compartment which can be already fed, during the packing operation, with new material to be pressed.
Claims11
Process for pressing fibrous material in bale form in a final press and for subsequently packing and hooping these bales, comprising the steps of
- (a) covering pressing faces of a press-ram and of a bottom plate of the final press with blanks of flexible sheet-like packing material which project beyond the pressing faces and are held in this position, and thereafter introducing already prepressed fibrous material into the final press between said blanks and pressing the material;
- (b) after the pressing operation, removing side walls of a press box of the press from the fibrous material, while the press maintains the bale of material under applied pressure, far enough to enable a holding device to receive the pressed bale including the end piece of the press-ram and the bottom plate;
- (c) receiving the pressed bale including the press-ram end piece and bottom plate by means of the holding device and moving the same on a predetermined path out of the pressing region to further working positions, with the pressed height of the bale being allowed to increase at most slightly;
- (d) subsequently automatically bending projecting areas of the blanks of packing material onto the side faces of the bale by means of holding-down or turning-in devices and holding the bent-down areas in this position;
- (e) then reinforcing the bale with hooping means;
- (f) subsequently, by opening the holding device, increasing the distance between the press-ram end piece and bottom plate so that the bale is released to be transported away;
- and
- (g) returning the press-ram end piece and bottom plate thereafter into the pressing region by means of the holding device.
5 more elements
Apparatus for pressing fibrous material in bale form and for subsequently packing and hooping these bales, comprising
- (a) a bale press including a press ram with at least two releasable end pieces of the press ram and with at least two movable bottom plates which each have tying grooves for hooping and which each have packing-material holding devices to hold blanks of packing material which project beyond the pressing faces,
- (b) interlocking devices on the upper part of the press-ram which ensure a fixed connection of the releasable end piece to the upper part of the press-ram,
- (c) fixing devices at the foot of the bale press for positioning the movable bottom plate in the pressing region of the bale press during a pressing operation,
- (d) at least one press box whose side walls represent the press compartment of the bale press and which are connected to operating mechanisms which enable the position of the side walls to be fixed in the pressing position during the pressing operation and enable the side walls to be removed, after the pressing operation, out of the region of the pressed material including the press-ram end piece and bottom plate.
- (e) at least two bale holding devices which can be moved on predetermined paths between different working positions outside the bale press and the pressing region of the bale press and which each have grabbing devices to receive a pressed bale, and the associated press-ram end piece, as well as further devices which enable the pressed material to be released,
- (f) holding-down devices for bending and holding down onto the side faces of the bale the blanks of packing material which project beyond the pressing faces, these holding-down devices being arranged so that they act upon the bale, which is held in the holding device, in a working position outside the working region of the bale press,
- (g) hooping devices which enable the pressed bale to be reinforced by means of bands or wires in a further working position of the holding device, and
- (h) covering devices which enable the press-ram end piece and the bottom plate to be covered with blanks of packing material in a working position of the holding device after release of the bale.
5 more elements
Dependencies are inferred from the claim text.