Backing Means Patents (Class 412/30)
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Patent number: 10011139Abstract: A device for processing a spine of a book block suspended from a circulating clamp on a conveyor of a bookbinding machine includes a processing device positioned opposite the clamp and facing the spine of the book block. A tensioning device is includes a fixed support roller to act perpendicularly on one side of the clamp and an overhang of the book block, and an adjustable pressing roller to act perpendicularly on another side of the clamp and the overhang of the book block. A controlled adjusting device is connected to the adjustable pressing roller. The controlled adjusting device adjusts the adjustable pressing roller based on a thickness of the book block.Type: GrantFiled: June 15, 2009Date of Patent: July 3, 2018Assignee: MUELLER MARTINI HOLDING AGInventors: Theo Hug, Harald Alber, Erwin Meienberger, Christian Abegglen
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Patent number: 9272562Abstract: A book forming and pressing machine includes a pressing device that has a number of spaced-apart pressing plates, joint-burn-in rails and at least one station for accommodating a book block. A loading device has a loading table. A reshaping device includes a mechanism to shape a front cut of a book block. The mechanism includes a tool carrier having a shaping tool to shape the front cut. Tool carrier and/or the shaping tool executes a series of movements in one plane or in three-dimensional space, relative to the front cut to be shaped, while the book block is held in the pressing device.Type: GrantFiled: April 10, 2013Date of Patent: March 1, 2016Assignee: Mueller Martini Holding AGInventor: Christian Ganter
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Patent number: 9242499Abstract: The glue application unit comprises side glue application members which have a pair of scrapers (7, 7) and can engage with the back margins (s) of the book block (P). The scrapers consist of elastic rod-like bodies (7a) and scraping portions (7b) provided at leading ends of the bodies. The scrapers obliquely extending in a direction of movement of the book block from the outside of the path of the downwardly protruding portion of the book block into the path in such a way that the scrapers contact each other in an inverted V shaped configuration. The scraping portions engage with the back margins of the book block by the elastic biasing of the bodies while the downwardly protruding portion of the book block passes between the scrapers.Type: GrantFiled: September 2, 2011Date of Patent: January 26, 2016Assignee: HORIZON INTERNATIONAL INC.Inventors: Hirohito Nakanishi, Kou Ohuchiyama, Takehito Yokogi, Akira Onodera
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Patent number: 9227454Abstract: A book forming and pressing machine includes a reshaping device to perform a shaping operation on a book block, a pressing device having a number of spaced-apart pressing plates and burn-in rails to press the book block during the shaping operation, and a loading device that includes a loading table. The loading table includes a book block back support arrangement to support the book block back during the shaping operation. The latter arrangement includes at least one pair of prism plates having shaped upper edges and arranged spaced-apart, extending parallel or quasi-parallel to each other to support a correspondingly shaped book block back during the shaping operation. The arrangement further includes at least one feed element operatively connected with each prism plate and adjustable to a position to support a differently shaped book block back in place of the shaped upper edges of the prism plates.Type: GrantFiled: April 5, 2013Date of Patent: January 5, 2016Assignee: Mueller Martini Holding AGInventor: Christian Ganter
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Patent number: 9180720Abstract: A method for operating a book forming and pressing machine that includes a pressing device and a re-forming device to form a front cut of a book block. Values relating to the book block are determined with a higher order control along a book production line upstream of the book forming and pressing machine. The determined values are transmitted to the pressing device, the re-forming device and/or pressing plates of the pressing device for finishing the book block. A forming tool of the re-forming device is selected based on values that meet operational requirements for the processing of the front cut. The selected forming tool is moved in a plane or space to an operating position for forming the front cut of the respective book block. Movement of the pressing plates is controlled based on the measured book thickness and thickness of the book cover for the book block.Type: GrantFiled: April 30, 2013Date of Patent: November 10, 2015Assignee: Mueller Martini Holding AGInventor: Christian Ganter
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Patent number: 9004837Abstract: A method and a device for pressing a book block over the rounded back of a book block having a longitudinal axis extending in the center and along the back. The book block is clamped between two clamping jaws of a clamping device, in a region adjacent to the back of the book block, parallel to the longitudinal axis of the back. A pressing device presses a pressing member against the back, wherein the pressing member is placed approximately in the center of the back onto the book block back. At least a section of the pressing member is then moved across the back. Once the pressing member, which is oriented parallel to the longitudinal axis of the back, is placed onto the back it then moves along at least one continuously preselected movement path over the back.Type: GrantFiled: December 14, 2011Date of Patent: April 14, 2015Assignee: Mueller Martini Holding AGInventor: Thomas Friese
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Publication number: 20130266400Abstract: A book forming and pressing machine includes a reshaping device to perform a shaping operation on a book block, a pressing device having a number of spaced-apart pressing plates and burn-in rails to press the book block during the shaping operation, and a loading device that includes a loading table. The loading table includes a book block back support arrangement to support the book block back during the shaping operation. The latter arrangement includes at least one pair of prism plates having shaped upper edges and arranged spaced-apart, extending parallel or quasi-parallel to each other to support a correspondingly shaped book block back during the shaping operation and. The arrangement further includes at least one feed element operatively connected with each prism plate and adjustable to a position to support a differently shaped book block back in place of the shaped upper edges of the prism plates.Type: ApplicationFiled: April 5, 2013Publication date: October 10, 2013Applicant: Mueller Martini Holding AGInventor: Christian GANTER
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Patent number: 8534707Abstract: An information page (1) of a security document, includes: an information part (3), on the upper or lower surface of which part of the information recorded on the information page (1) can be seen; and a flexible connecting part (2) with good bending strength for attaching the information page (1) to a security document. To ensure that detaching the information part and the connecting part from each other leaves visible marks, the connecting part (2) has a netlike structure, and the connecting part (2) is arranged to penetrate into the information part (3) in the immediate vicinity of the upper or lower surface of the information part.Type: GrantFiled: November 7, 2006Date of Patent: September 17, 2013Assignee: Setec OyInventors: Jari Herlin, Maila Korhonen, Teemu Pohjola, Taru Syrjänen, Mika Holmberg
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Patent number: 8475107Abstract: A paper-sheet handling device relating to the present invention has a configuration such that a binder paper alignment unit for temporarily reserving a plurality of paper-sheets perforated at predetermined positions, a movement mechanism for binding the bundle of paper-sheets thus aligned owing to the above by means of a binding component, and a binder cassette for storing the binding components for being transferred thereto, wherein the movement mechanism is arranged on the downstream side of the binder paper alignment unit and the binder cassette and also, the binder paper alignment unit and the binder cassette are arranges radially on the upstream side to form an approximately V-shape by making the aforesaid movement mechanism to be a reference.Type: GrantFiled: August 29, 2006Date of Patent: July 2, 2013Assignee: Max Co., Ltd.Inventor: Kiichi Haramiishi
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Patent number: 8475104Abstract: A production line including a casing-in machine and a processing section upstream of the casing-in machine. The processing section includes processing stations arranged at clocking intervals along the processing section to process a book block spine. The processing section includes a first processing station group and a second processing station group. The production line further includes a conveyor to successively supply the book blocks in clocked operation to the processing stations. The conveyor includes a first conveying section assigned to the first processing station group, the first conveying section including a first individual drive, and a second conveying section assigned to the second processing station group, the second conveying section including a second individual drive. The production line further includes a control unit operatively connected to the first individual drive and second individual drive to change the clocking interval length along the processing section.Type: GrantFiled: June 3, 2010Date of Patent: July 2, 2013Assignee: Mueller Martini Holding AGInventor: Hans Mueller
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Publication number: 20120155991Abstract: A method and a device for pressing a book block over the rounded back of a book block having a longitudinal axis extending in the center and along the back. The book block is clamped between two clamping jaws of a clamping device, in a region adjacent to the back of the book block, parallel to the longitudinal axis of the back. A pressing device presses a pressing member against the back, wherein the pressing member is placed approximately in the center of the back onto the book block back. At least a section of the pressing member is then moved across the back. Once the pressing member, which is oriented parallel to the longitudinal axis of the back, is placed onto the back it then moves along at least one continuously preselected movement path over the back.Type: ApplicationFiled: December 14, 2011Publication date: June 21, 2012Applicant: Mueller Martini Holding AGInventor: Thomas Friese
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Publication number: 20120087765Abstract: A spine formation device includes a sheet conveyer to transport a bundle of folded sheets with the folded portion of the bundle forming a front end portion of the bundle, a clamping unit to clamp the bundle from both sides in a direction of thickness of the bundle, a spine forming member to flatten the folded portion of the bundle, disposed in that order in a sheet conveyance direction, and a controller that causes the sheet conveyer to transport the bundle of folded sheets to a first position downstream from an upstream end of the spine forming member in the sheet conveyance direction and to reverse the bundle a predetermined distance from the first position to a second position upstream from the first position in the sheet conveyance direction before the clamping unit clamps the bundle.Type: ApplicationFiled: September 27, 2011Publication date: April 12, 2012Applicant: Ricoh Company, Ltd.Inventor: Nobuyoshi Suzuki
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Patent number: 8123447Abstract: A method for backing printed products includes feeding signatures to a transport and stitching line of a gatherer stitcher by a plurality of feeders. A plurality of signatures are gathered on the transport and stitching line and forms a folded sheet assembly. The folded sheet assembly is stitched to form a brochure along the transport and stitching line. The spine of the brochure is backed along the transport and stitching line by a pressing apparatus.Type: GrantFiled: February 14, 2006Date of Patent: February 28, 2012Assignee: Heidelberger Druckmaschinen AGInventors: Lutz Richter, Siegmar Tischer
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Patent number: 8070407Abstract: A sheet bundle conveying device includes a tray device on which sheets are placed and held in a bundle, a sheet bundle conveying path along which a sheet bundle from the tray device is guided to a predetermined processing position, a grip transferring device located on the sheet bundle conveying path for gripping and transferring the sheet bundle from the tray device to a processing position, and a grip controlling device for controlling the grip transferring device. When an apparatus error occurs, the grip transferring device moves the conveyed sheet bundle backward to the collection stage. A grip on the sheet bundle is released on the collection stage after the sheet bundle is returned.Type: GrantFiled: April 3, 2007Date of Patent: December 6, 2011Assignee: Nisca CorporationInventor: Shinya Sasamoto
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Patent number: 8007217Abstract: An arrangement performs backlining or headbanding of a spine of a book block conveyed on a conveying section of a book production line through a backlining station. A feeding device feeds backlining material in a transfer direction perpendicular to a book block conveying direction. A unit includes a cross cutter to cut the backlining material into backlining sections, a transfer mechanism to transfer the backlining sections onto the book block spine, and a support table to support the backlining section being transferred onto the book block spine. A guide element is disposed above and at a distance to a book block spine in a production position, which guide element is advanced to bridge the book production line to transfer the backlining material through the book production line to allow at least one of outfitting or retrofitting of the backlining station.Type: GrantFiled: August 31, 2007Date of Patent: August 30, 2011Assignee: Mueller Martini Holding AGInventor: Hans Müller
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Patent number: 7686557Abstract: A device for backing rounded book blocks (2) clamped near the spine, by a pressing beam (9) and a slide (7) that accommodates the pressing beam (9) and can be alternately displaced along arc-shaped races (6) in a swinging fashion by driving means (17) in a height-adjustable supporting bearing (5) that is laterally supported against the effect of a spring element (29). Members are provided for controlling (21, 22, 32, 33) the lateral position of the supporting bearing (5) and for lowering and raising (10, 11, 12) the pressing beam into the starting position for its return stroke. An eccentric starting position is realized during the lowering of the pressing beam (9) on the spine (2a), in the form of a swinging position of the slide (7) that is offset toward the opposite side of the spine center (2b) referred to the respective side to be backed thereafter.Type: GrantFiled: April 23, 2007Date of Patent: March 30, 2010Assignee: Kolbus GmbH & Co. KGInventors: Manfred Albrecht, Torsten Meineke
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Publication number: 20080056849Abstract: An arrangement performs backlining or headbanding of a spine of a book block conveyed on a conveying section of a book production line through a backlining station. A feeding device feeds backlining material in a transfer direction perpendicular to a book block conveying direction. A unit includes a cross cutter to cut the backlining material into backlining sections, a transfer mechanism to transfer the backlining sections onto the book block spine, and a support table to support the backlining section being transferred onto the book block spine. A guide element is disposed above and at a distance to a book block spine in a production position, which guide element is advanced to bridge the book production line to transfer the backlining material through the book production line to allow at least one of outfitting or retrofitting of the backlining station.Type: ApplicationFiled: August 31, 2007Publication date: March 6, 2008Applicant: Muller Martini Holding AGInventor: Hans Muller
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Publication number: 20080019801Abstract: A device for backing rounded book blocks (2) clamped near the spine, by a pressing beam (9) and a slide (7) that accommodates the pressing beam (9) and can be alternately displaced along arc-shaped races (6) in a swinging fashion by driving means (17) in a height-adjustable supporting bearing (5) that is laterally supported against the effect of a spring element (29). Members are provided for controlling (21, 22, 32, 33) the lateral position of the supporting bearing (5) and for lowering and raising (10, 11, 12) the pressing beam into the starting position for its return stroke. An eccentric starting position is realized during the lowering of the pressing beam (9) on the spine (2a), in the form of a swinging position of the slide (7) that is offset toward the opposite side of the spine center (2b) referred to the respective side to be backed thereafter.Type: ApplicationFiled: April 23, 2007Publication date: January 24, 2008Inventors: Manfred Albrecht, Torsten Meineke
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Patent number: 7285084Abstract: A folded back portion flattening device includes a gripper and a presser. The gripper grips a sheet bundle formed into a booklet with the folded back portion protruding from the gripper. The presser presses the folded back portion of the sheet bundle gripped by the gripper, and includes pressing rollers which have pressing rotational surfaces and which are disposed along the folded back portion. The pressing rotational surfaces press the folded back portion. The pressing rollers are disposed so that the rotational pressing surface of a second pressing roller, which presses the folded back portion after the rotational pressing surface of a first pressing roller has pressed the folded back portion, presses deeper into an edge of the sheet bundle than the rotational pressing surface of the first pressing roller. At least one of the gripper and presser is movable in a direction parallel to the folded back portion.Type: GrantFiled: November 1, 2006Date of Patent: October 23, 2007Assignee: Canon Kabushiki KaishaInventors: Hitoshi Fujimoto, Yusuke Obuchi, Daisaku Kamiya, Kiyoshi Watanabe, Tomokazu Nakamura, Kenichi Hayashi, Toshimasa Suzuki, Hideki Kushida, Atsuteru Oikawa
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Patent number: 7147598Abstract: A folded back portion flattening device includes a gripper and a presser. The gripper grips a sheet bundle formed into a booklet with the folded back portion protruding from the gripper. The presser presses the folded back portion of the sheet bundle gripped by the gripper, and includes pressing rollers which have pressing rotational surfaces and which are disposed along the folded back portion. The pressing rotational surfaces press the folded back portion. The pressing rollers are disposed so that the rotational pressing surface of a second pressing roller, which presses the folded back portion after the rotational pressing surface of a first pressing roller has pressed the folded back portion, presses deeper into an edge of the sheet bundle than the rotational pressing surface of the first pressing roller. At least one of the gripper and presser is movable in a direction parallel to the folded back portion.Type: GrantFiled: February 24, 2005Date of Patent: December 12, 2006Assignee: Canon Kabushiki KaishaInventors: Hitoshi Fujimoto, Yusuke Obuchi, Daisaku Kamiya, Kiyoshi Watanabe, Tomokazu Nakamura, Kenichi Hayashi, Toshimasa Suzuki, Hideki Kushida, Atsuteru Oikawa
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Patent number: 6817605Abstract: An apparatus for creating a pillowless booklet, comprising: a means for accumulating a plurality of sheets to form a bundle; a means for fastening said plurality of sheets in said bundle operatively connected to said accumulating means; a means for forming a booklet spine edge operatively connected to said fastening means; and a means for flattening said booklet spine edge in order to create a pillowless booklet operatively connected to said booklet spine forming means, comprising; a crease wire; a crease roller located substantially adjacent to said crease wire; a guide operatively connected to said crease roller; a carriage roller operatively connected to said guide rail; and a clamp operatively connected to said guide rail.Type: GrantFiled: April 30, 2003Date of Patent: November 16, 2004Assignee: Hewlett-Packard Development Company, L.P.Inventor: Greg Bohn
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Patent number: 6698796Abstract: This is to provide a cover suitable to hollow-backed binding and provide a binding method for an album and the like for obtaining a well-bound appearance using the cover at low cost and easy to turn over. A cover is composed of a decoration cloth, a pair of substratum paper and a spine affiche adhered on required positions on the back of the decoration cloth, an interconnected reinforcement paper adhered to substratum paper to create a space between a spine affiche and a reverse paper.Type: GrantFiled: August 8, 2001Date of Patent: March 2, 2004Assignee: Nakabayashi Co., Ltd.Inventor: Shingo Kurahashi
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Publication number: 20030215308Abstract: A shaping part for producing books with round spine includes a frame (3, 5, 7, 10), which defines an essentially rectangular inner space, and in the inner space of which a plurality of vertically adjustable lamellae, whose orientation at right angles to the plane of the frame is predetermined by the frame, are arranged next to one another. Any desired profile surface, preferably in the form of a radius, can be formed by a suitable displacement of lamellae located next to one another. To absorb strong normal forces during pressing, the lamellae are braced against one another. The lamellae can be heated by contact with the heated carrier body for preforming the spine of books. The profile surface of the shaping part may be concave or convex.Type: ApplicationFiled: April 4, 2003Publication date: November 20, 2003Inventor: Horst Rathert
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Patent number: 6607070Abstract: A method for transferring book blocks or the like into a transport device of a bookbinding machine. The book block is first clamped in a force-locking manner. At least one corner of the back edge or of the front edge of the book block is aligned with a position, which can be set in a predefined manner, by relative displacement of the two sides of the book block in the plane of the book block. The book block is then clamped in a force-locking manner by the transport device.Type: GrantFiled: September 14, 2001Date of Patent: August 19, 2003Assignee: Kolbus GmbH & Co. KGInventors: Carsten Brommer, Ansgar Rohe-Krebeck, Christoph Schmücker
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Patent number: 6450749Abstract: An arrangement for applying an adhesive to outer surfaces of an inner book to be inset into a book cover by an insetting machine, moving inner books on saddle plates of a circulating conveyor vertically upwardly. The arrangement has an adhesive applying device with two application rollers positioned opposite one another in an area of adhesive application. The two application rollers each roll along one of the outer surfaces of the inner book to apply an adhesive onto the outer surfaces of the inner book as the inner book is moved upwardly on a saddle plate. The two application rollers each have a recess forming a shoulder parallel to an axis of rotation of the application rollers, wherein the recesses apply the adhesive to grooves of the inner book and wherein a rotary position of the recesses is adjustable according to a position of a given groove shape of the inner book passing through the area of adhesive application.Type: GrantFiled: June 27, 2000Date of Patent: September 17, 2002Assignee: GRAPHA-Holding AGInventor: Christian Ganter
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Patent number: 6171045Abstract: A device for the mechanical pressing of rounded book blocks held clamped in the region near the back is presented. The device includes a molding tool, which acts upon the book block back with a pressing force. A carriage is provided which receives the molding tool and is pivotable onto alternate sides of the book block back via a drive disposed on curved tracks in oppositely arranged, vertically displaceable bearings. The traveled radius of the active surface of the molding tool is smaller than the radius of the book block back and a tangential tensile/thrust component acting upon the lateral regions of the book block back in order to bend the printed sheets over is imparted thereon. A drive for lowering the molding tool onto the book block back and for raising the molding tool for the return stroke into the central position is provided in order to optimize the pressing process and to reduce the structural outlay and to reduce the setup time.Type: GrantFiled: December 20, 1999Date of Patent: January 9, 2001Assignee: Kolbus GmbH & Co. KGInventors: Dieter Nehring, Christoph Schm{umlaut over (u)}cker
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Patent number: 6168363Abstract: A device for rounding and pressing book blocks with a conveying device for the book blocks. The device includes rounding rollers, pressing jaws or similar clamping elements, which are displaceable relative to one another, which act to receive the book block and act with a predefined force upon the book block. The device automatically adjusts the clamping elements to different formats of the book block and, in the event of deviations in the book block thickness, the clamping elements are displaceable relative to one another via articulately connected levers. The levers function to clamp the book block via an operating cylinder acting upon the free ends of the levers and automatically aligning the book block. The point of rotation of the levers being displaceably mounted in a guide aligned with the center of the conveying device of the book block.Type: GrantFiled: December 22, 1999Date of Patent: January 2, 2001Assignee: Kolbus GmbH & Co. KGInventor: Dieter Nehring
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Patent number: 6158940Abstract: A device for the back rounding of book blocks in a book binding machine cooperating with a conveyor device. The device includes a driving arrangement and rounding elements driven in rotation by the driving arrangement. The rounding elements taking up the book block following release of the book block by the conveyor device. The rounding elements acting on both sides of the book block through pressurized rotational movement thereof. When the book blocks are gripped by the rounding elements, the rounding elements may selectively travel in a lifting movement which is separate from the rotational movement into preselectable, defined vertical positions.Type: GrantFiled: December 21, 1999Date of Patent: December 12, 2000Assignee: Kolbus GmbH & Co. KGInventor: Dieter Nehring
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Patent number: 6053684Abstract: A method and a device for the production of folded products utilizes a row of folding jaws and a row of counter folding jaws. A signature to be cross-folded is inserted between the jaws by a folding blade. The folding jaws and counter folding jaws form a line of embossing on the folded signatures adjacent the transverse fold line. The resultant folded item has an increased moment of resistance in the direction of transport.Type: GrantFiled: May 11, 1998Date of Patent: April 25, 2000Assignee: Koenig & Bauer-Albert AktiengesellschaftInventors: Gunther Oskar Eckert, Thomas Werner Rugamer
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Patent number: 5658111Abstract: Apparatus for rounding the spines of book blocks comprises rounding elements that act on the sides of the book block, the action of these rounding elements being due to a defined rotation and pressure, the rounding elements consisting of rounding segments which are drive-rotated by actuating mechanisms and can be moved vertically to thereby execute rolling movements on the sides of the book block. The vertical movement of said rounding segments are superimposed on their rotation in a manner such as to compensate for the vertical movement of the book block generated as a consequence of the rotation.Type: GrantFiled: August 23, 1995Date of Patent: August 19, 1997Assignee: Kolbus GmbH & Co. KGInventor: Horst Rathert
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Patent number: 5556244Abstract: The backing of a previously rounded book block is accomplished, while the book block is clamped between oppositely disposed gripping jaws, by subjecting the spine region of the book block to composite forces resulting from imparting a swinging motion along an arcuate path to a pressing beam carrier, to cause the pressing beam to bend the book block sheets outwardly away from the center line of the block, and superimposing tangential sliding motion on the pressing beam as it acts on the book block in the region adjacent the edges of the spine to thereby controllably form creases in the opposite sides of the block.Type: GrantFiled: March 13, 1995Date of Patent: September 17, 1996Assignee: Kolbus GmbH & Co. KGInventors: Kurt Begemann, Horst Rathert, Manfred Albrecht
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Patent number: 5114293Abstract: The rounding of the backs of book blocks in a bookbinding machine is accomplished through the use of rotatable rounding rollers which acquire the book blocks from continuously moving clamping devices of a block transport system, the rounding rollers moving in synchronism with the clamping devices along a portion of the path of book block motion defined by the transport system during the rounding operation. The rotational motion of the rounding rollers against the book block sides is superimposed on movement of the rounding rollers along the book block sides in a direction transverse to the path of motion thereof. Subsequent to completion of the rounding operation, the rounding rollers are returned to their initial position along return paths which are displaced from the book block motion path and the rounding operation is performed on a book block subsequently arriving via the transport system.Type: GrantFiled: February 25, 1991Date of Patent: May 19, 1992Assignee: Kolbus GmbH & Co. KGInventor: Horst Rathert
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Patent number: 5104275Abstract: In a method of backing book blocks, simultaneous backing operations are performed on the two halves of the block back by two backing elements which simultaneously execute a rolling movement on the block back in opposite directions starting from its center, so as to compress the printed sheets in its central region, and also execute a tangential sliding, rubbing movement on the book block back, so as to bend the printed sheets over in its side regions.Type: GrantFiled: February 21, 1991Date of Patent: April 14, 1992Assignee: Kolbus GmbH & Co. KGInventor: Horst Rathert
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Patent number: 4747740Abstract: In a system for setting the vertical position of the rounding bar in a book block rounding and backing machine which possesses a support bearing unit, within which the rounding bar that acts on the spine of the book block reciprocates, the support-bearing unit is adjusted in the vertical direction, in side frames, by means of adjusting spindles, so as to set its vertical position, and is immobilized in the side frames by means of a clamping arrangement. The support bearing unit 7 is carried in a frame 4 and can, with the rounding bar 3, be deposited, by their own dead weight, onto the spine of a book block 1. The support bearing unit 7 is supported on intermediate supporting elements 24, 24a so that it cannot descent below them, while being free to slide upwards. The intermediate supporting elements 24, 24a are lowered by means of adjusting spindles 22 which can be motor driven.Type: GrantFiled: April 24, 1987Date of Patent: May 31, 1988Assignee: Kolbus GmbH & Co. KGInventor: Karl-Ludwig Rahe