Robert Boschgmbh

Julius Mazurkiewicz

Peter De Block

Paul Criel

Manfred Wilhelm

Peter Wijnants

Christian Wilms

Jan Dietrich

Thomas Kotlarski

Joris Grammens

Thomas Blum

Josef Kleckner

Theo Troester

The invention is based on a method of producing bent spring elements from a spring steel strip (), wherein a feed unit () delivers the spring steel strip () from a supply roll () to a bending unit () having at least three bending rollers () and a reverse bending roller (), of which at least one bending roller () and the reverse bending roller () can be adjusted transversely to the spring steel strip () by bending motors (), and wherein a cutting-off unit () adjoins the bending unit (), said cutting-off unit () cutting off the spring steel strip () into individual spring elements by means of cutting-off tools (). It is proposed that the cutting-off tools () be movable in the longitudinal direction of the spring steel strip () in a numerically controlled manner and that they be synchronized with the feed movement of the spring steel strip () during the cutting-off operation.

Method and device for producing bent spring elements

In a method and a device for producing curved lengths of spring band steel in order to produce precisely toleranced, dimensionally stable bending radii, the spring band steel () pass through a bending unit (), which is comprised of three support points () spaced apart from one another, and passes through a reverse bending unit (), which is disposed after the bending unit () in the advancing direction of the spring band steel () and is comprised of a fourth support point (), and in a cutting unit (), the curved and recurved lengths of spring band steel () are cut from the spring band steel (). The central support point () of the bending unit () and the fourth support point () of the reverse bending unit () are embodied so that they can be moved and are controlled in their advancing in relation to the spring band steel () by means of a numerical control unit () in accordance with predetermined programs (FIG.).

Method and device for producing curved lengths of spring band steel

A wiper blade is proposed, which is for cleaning for windows, particularly of motor vehicles. The wiper blade () has an elongated, rubber-elastic wiper strip (), which can be placed against the window () and is connected to an elongated, spring-elastic support element () so that their longitudinal axes are parallel, which support element () is directly connected to a device () for connecting the wiper blade to a driven wiper arm (). The support element () has two band-like spring strips (), which are situated in a plane that is disposed in front of the window, essentially parallel to the window, and whose one, lower band surfaces () are oriented toward the window and whose adjacent, inner longitudinal edges (), which are disposed spaced a distance () apart from each other, each protrude into a respective longitudinal groove (, or), which grooves are associated with each longitudinal edge and are open toward a respective longitudinal side of the wiper strip (), and these two spring strips () are connected to each other by at least two crosspieces () disposed spaced apart from each other in the longitudinal direction. Manufacturing advantages for the wiper blade according to the invention are achieved if each crosspiece () has a middle section () which extends spaced a distance () apart from the upper band surfaces () of the spring strips (), producing bridge-like crosspieces, where the distance () between the two longitudinal strips () is less than the bridge width ().

Wiper blade for cleaning vehicle windows

A wiper blade is proposed, which is used for cleaning windows, particularly of motor vehicles. The wiper blade () has an elongated, rubber-elastic wiper strip (), which can be placed against the window () and is connected in a longitudinally parallel fashion to an elongated, spring-elastic support element (), which has a connecting device () for a wiper arm (). The wiper blade has two band-like spring strips (), which are parallel to each other and are disposed in a plane spaced a distance () apart from the window () and whose one, inner longitudinal edges () disposed close to each other are spaced a distance () apart from each other, and the wiper strip, which has a uniform cross section over its longitudinal span, has a strip-like wiper lip (), which can be placed against the window and which, by means of a narrow intermediary strip () that is formed by opposing groove-like constrictions (), is connected to a covering strip () secured to the support element (), and the spring strips secure the wiper strip. A wiper blade, which is particularly low-profile and therefore insensitive to the flow conditions of the window, is obtained if each of the two inner longitudinal edges () of the spring strips () is disposed in one of the two groove-like constrictions () of the wiper strip (), where the width of the constriction grooves (), at least over an outer partial region, is greater than the thickness of the spring strips ().

Wiper blade for cleaning vehicle panes

In a wiper blade ( ) a termination part ( or or or ) which covers each end of the wiper blade ( ) has a base body ( ), located on the side remote from the window ( ) and bracing itself on the wiper blade ( ) which base body is provided with hook-like extensions ( or ) that cross the support element ( ) on both of its long sides and engage the side of the support element toward the window from behind; if at least one detent shoulder ( or ) pointing toward the other end portion is disposed oh each of the two end portions of the support element, and a counterpart shoulder ( or ) present on the termination part is associated with the detent shoulders; and if furthermore at least one of the two shoulders and/or at least one of the two extensions is elastically deflectable.

Wiper blade for the glass surfaces of motor vehicles with an elongated, spring-elastic support element

The invention relates to a method for producing a bandlike-elongated, spring-elastic element ( ) for supporting a rubber-elastic wiper strip ( ) of a windshield wiper for vehicles, which element has two spring rails ( ), located with a spacing ( ) from one another and essentially parallel to one another, which at least on both of their end portions are solidly joined together by transverse ribs ( ) that are disposed on the one band face ( ) of the spring rails and that span the spacing ( ). An especially advantageous production method for such a support element is obtained in that the prefabricated spring rails ( ) are solidly joined together in pairs and oriented essentially parallel to one another by means of at least one bandlike retaining element ( ) oriented transversely to the spring rails; that the gridlike combination ( ) thus obtained is subjected to at least one further method step, by which, by cutting the retaining element ( ) between the applicable pairs of spring rails ( ), the support elements ( ) are released from the combination ( ).

Method for producing a wiper-strip support element for motor vehicle windshield wipers

In a method for producing flat-blade windshield wipers with curved flat blades in particular, and for obtaining dimensionally stable bending radii with exact tolerances, a spring band formed by flat blades individually arranged one next to the other, is bent between three support sites spaced from each other in the longitudinal direction of the spring band and resting successively in an alternating manner on one of the two sides of the spring band, and the spring band is thereafter re-bent on a subsequent support site in the opposite direction by a re-bending degree lower than the bending degree. The flat blade so treated is subsequently separated from the spring band, combined with a rubber-elastic wiping strip, and provided with a connecting device for a wiper arm.

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Diest, Belgium

Julius Mazurkiewicz