Bookbinding: process and apparatus – Process – Of adhesive binding
Reexamination Certificate
1999-11-01
2001-12-11
Shoap, Allan N. (Department: 3722)
Bookbinding: process and apparatus
Process
Of adhesive binding
C412S007000, C412S037000, C412S038000
Reexamination Certificate
active
06328519
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method and device for producing printed products, such as newsprint, brochures and the like, from folded signatures by partially joining the signatures at the folded edges with an adhesive to form a bound spine.
2. Description of the Related Art
Such methods are known in the art. With these methods, the fold of the signatures is perforated several times along its length from the inside out, so that the marginal sections of the perforation of the individual signatures are offset relative to each other from one signature to the next. The signatures are then collected with their flat sides contacting each other and transferred in the form of loose book blocks to a gluing machine. First, a cold-setting adhesive is rubbed in with a brush-type roller at the book spine protruding from the clamps, with the cold-setting adhesive penetrating into the perforation. Subsequently a hot-setting adhesive is applied by another roller. This method is referred to in the printing trade as “burst binding.”
In another method referred to as “notch binding”, after the milling and/or stripping operation, grooves extending transversely to the spine of a book block are milled in the adhesive binding device. The grooves are subsequently filled with an adhesive. Alternatively, the adhesive may also be an applied in two steps; for example, a cold-setting adhesive is applied first after the spine of the book block is milled or stripped. The book back is then dried and transversely extending grooves are milled in the conglutinated book back, the grooves subsequently filled by applying a hot-setting adhesive to the book back.
SUMMARY OF THE INVENTION
It is an object of the present invention to use an alternative method, which is different from the methods described above, of producing a printed product which is also bound using an adhesive.
According to the invention, the object is solved by moving the signatures astride on a saddle-shaped transport and collection path to apply a perforation at the fold and to subsequently glue the fold along the perforation.
The object is attained by the invention in a novel fashion whereby one or several signatures may be processed on the transport and collection path to form a printed product.
Advantageously, the signatures receive on the transport and collection path a punched or slotted perforation which at least approximately penetrates the height of the fold and continuously connects the fold with an adhesive.
It is particularly advantageous if the fold of the innermost signature of a printed product is not being perforated or does not have a perforation. In this way, all the signatures can be continually secured to each other.
In other words, regardless if one signature or several signatures are superimposed astride on the transport and collection path for applying a perforation, the first signature of a printed product has an innermost signature with a fold that is not perforated.
Preferably, the signatures designated for a printed product are perforated and glued together on the transport and collection path. It this way, a convenient channel for uninterrupted injection of the adhesive is established.
Alternatively, the innermost signature which has a fold that is not perforated, may be supplied as the first signature and separately to the transport and collection path.
Advantageously, a cover may be applied, wherein the cover may be supplied astride to the conglutinated signatures at the spine and pressed against the spine.
To optimally attach the cover to the spine of the bound signatures, an adhesive may be applied to the spine before the cover is placed on the spine.
The innermost signature of a printed product may also be supplied for the printed product at the end of a collection process by placing the section of a transport and collection path to which the innermost signature is supplied, at a lower level and by moving the previously collected signatures over the innermost signature at the end of the collection path.
A device is proposed for carrying out the method of the invention, wherein the device includes at least a signature feeder, followed by a binding device located along a transport and collection path. The device is characterized in that the transport and collection path is saddle-shaped for receiving and collecting signatures astride and includes between the signature feeder and the gluing machine a perforating device operating on the folds of the signatures. Both stamped and slotted perforations can be provided to which the adhesive is applied.
Advantageously, the perforating device is located above the transport and collection path so that the folds can be immediately processed.
The perforating device can be designed so as to move together with the transported signatures along its operating range.
Preferably, the depth of the perforation can be adjusted at the perforating device by raising and lowering the appropriate perforating tool.
Other objects and features of the present invention will become apparent from the following detailed description considered in conjunction with the accompanying drawings. It is to be understood, however, that the drawings are intended solely for purposes of illustration and not as a definition of the limits of the invention, for which reference should be made to the appended claims.
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Carter Monica
Darby & Darby
Grapha-Holding AG
Shoap Allan N.
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