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US H440 HGranted
Blanket bar for narrow gap cylinders
AssigneeW. R. Grace & Co.
InventorDennis D. O'Rell
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AssigneeW. R. Grace & Co.
InventorDennis D. O'Rell
Estimating the term…
A blanket bar assembly for use on a printing blanket comprising a U-shaped bar having a centrally located channel and two arms extending outwardly from the channel in a substantially parallel relationship. Inwardly directed projections are provided on one or both arms and are directly aligned with holes on the opposite arm or arms. The projections are of such a length so as to be capable of extending through the holes and be deformed so as to lock the arms together. A printing blanket edge inserted into the channel and pierced by the projections is thereby securely fastened to the blanket bar.
A blanket bar comprising an elongated strip of metal having a channel, first arm and second arm radiating outwardly from the channel in parallel relationship to each other, the first arm and second arm having a series of projections perpendicular to the plane of the first and second arms, the first and second arms having a series of holes in alignment with the series of projections on the other arm, the projections being of such length as to extend through the holes on the other arm and capable of being clenched over so as to lock the first and second arms together.
A printing blanket and blanket bar assembly comprising a printing blanket having a leading edge and a trailing edge, a first and second blanket bar fastened to the leading and the trailing edge, the first and second blanket bars being U-shaped and having a first and second arm projecting outwardly in a substantially parallel relationship to each other from a center of the bar, the first and second arms having a series of projections and holes arranged so that the projections of one arm are in alignment with the holes of another arm;
A printing blanket and blanket bar assembly comprising a printing blanket having a leading edge and a trailing edge, a first blanket bar fastened to the leading edge of the blanket and a second blanket bar fastened to the trailing edge of the blanket, the first and second blanket bars being formed of a metallic material having a thickness of from about 0.005 to about 0.020 inches, the metallic material being U-shaped and having a first and second arm projecting outwardly in a substantially parallel relationship to each other, the first and second arms having a series of projections and holes arranged so that the projections of one arm are in alignment within the holes of another arm;
Dependencies are inferred from the claim text.
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This invention relates to a blanket bar for securely attaching a printing blanket to a printing press, and more particularly, this invention relates to a blanket bar for mounting and securing blankets on presses wherein the blanket cylinder has a gap width less than 0.250 inches.
Printing blankets are generally made of one or more layers of cloth and other materials and generally have at least one surface coated with a rubber or other elastomeric material which acts as a transfer surface to take the ink image from the printing plate and transfer it to the paper on which it is to be printed.
Conventionally, these printing blankets are mounted onto the outer circumferential surface of a printing cylinder and are secured in place by various attachment means, such as reel rods or clamps. See for example, U.S. Pat. Nos. 4,261,262 and 3,675,573.
The accompanying drawings show preferred embodiments of the present invention, in which
FIG. 1 is a cross-sectional view of the blanket bar;
FIG. 2 is a cross-sectional view of the blanket bar and printing blanket as assembled for use;
In FIG. 1 is a preferred embodiment of the present invention.
The blanket bar 1 is generally formed in a U or V shape, having a channel portion 2 and two outwardly extending arms 3a and 3b which are substantially parallel to each other. On arm 3a is a projection 4. An opening 5 is optionally formed when the projection 4 is made in the arm 3a. The opening can occur when the projection is punched, stamped or otherwise formed out of the substantial flat surface of the arm 3a.
On arm 3b is a hole 6 substantially in alignment with the projection 4 of arm 3a. The hole 6 may be formed in any well known manner such as punching, stamping, drilling or casting.