Device for removing impurities from data carriers
AssigneeAgfa-Gevaert
InventorsWolfgang Ermer, Bernd Payrhammer, Heinz Rapp, Alois Bauer
Life of this patent
Estimating the term…
Abstract
A device which removes dust and/or other impurities from photographic films, records or other data carriers has one or more brushes whose bristles sweep along the surface or surfaces of a data carrier while the data carrier moves relative to the bristles and/or vice versa. The electrostatic charge which develops as a result of frictional engagement between the data carrier and the bristles is led away by providing each brush with bristles at least some of which consist of conductive material and are grounded via electrodes which contact the tips of the bristles and/or by way of the core of each brush.
Claims27
A device for cleaning data carriers, particularly photographic films, records, magnetic tapes and the like, comprising:
- (a) a brush for cleaning a data carrier, said brush including separate first and second cleaning elements, and said first elements being electrically conductive to thereby permit electrostatic charge on the data carrier to be neutralized while the data carrier is cleaned by said first elements, said second elements having a cleaning action superior to that of said first elements so as to enhance the cleaning effect obtained with the latter;
- and
- (b) grounding means connecting said elements to ground to thereby enable electrostatic charge on the data carrier to be dissipated.
A device for cleaning data carriers, particularly photographic films, records, magnetic tapes and the like, comprising:
- (a) an electrically conductive brush for cleaning a data carrier;
- and
- (b) grounding means connecting said brush to ground so as to enable electrostatic charge on the data carrier to be dissipated, said grounding means including a collector electrode having a surface portion which contacts a peripheral portion of said brush, and said surface portion substantially conforming to the shape of said peripheral portion to enchance the contact between said surface portion and said peripheral portion and thereby improve the dissipation of electrostatic charge generated on the data carrier.
A device for cleaning data carriers such as photographic films, records, magnetic tapes and the like which tend to undergo frictional electrostatic charging comprising at least one elongated brush having a surface section adapted to engage and clean a data carrier in response to relative movement between said brush and the data carrier, said surface section including at least some portions which consist of electrically conductive material;
- means for grounding said portions so as to dissipate electrostatic charge on the data carrier via said portions, said grounding means including a collector electrode which has a length substantially equaling the length of said brush and is in surface-to-surface contact with said surface section thereof;
- and an electrically conductive housing for said electrode and said brush connected with said electrode in electrically conductive relationship, at least the major portion of said brush being disposed in said housing.
A device for cleaning data carriers such as photographic films, records, magnetic tapes and the like which tend to undergo frictional electrostatic charging comprising at least one elongated brush of cylindrical outline having a surface section adapted to engage and clean a data carrier in response to relative movement between said brush and the data carrier, said surface section including at least some portions which consist of electrically conductive material;
- and means for grounding said portions so as to dissipate electrostatic charge on the data carrier via said portions, said grounding means including a collector electrode which has a length substantially equaling the length of said brush and is in surface-to-surface contact with said surface section thereof, and said electrode being arcuate transversely of its elongation and having a radius which at least substantially equals the radius of the periphery of said brush.
A device for cleaning data carriers such as photographic films, records, magnetic tapes and the like which tend to undergo frictional electrostatic charging comprising at least one elongated brush of cylindrical outline having a surface section adapted to engage and clean a data carrier in response to relative movement between said brush and the data carrier, said surface section including at least some portions which consist of electrically conductive material;
- and means for grounding said portions so as to dissipate electrostatic charge on the data carrier via said portions, said grounding means including a collector electrode which has a length substantially equaling the length of said brush and is in surface-to-surface contact with said surface section thereof, and said electrode being arcuate and surrounding said brush along an arc of 60.degree. to 180.degree..
A device for cleaning data carriers such as photographic films, records, magnetic tapes and the like which tend to undergo frictional electrostatic charging comprising at least one elongated brush having a surface section adapted to engage and clean a data carrier in response to relative movement between said brush and the data carrier, said surface section including at least some portions which consist of electrically conductive material;
- means for grounding said portions so as to dissipate electrostatic charge on the data carrier via said portions, said grounding means including a collector electrode which has a length substantially equaling the length of said brush and is in surface-to-surface contact with said surface section thereof;
- and an additional brush similar to and located opposite said one brush and defining therewith a nip through which the data carrier is compelled to pass.
Dependencies are inferred from the claim text.