Machine for the production of packaging wrappers

An apparatus for the continuous production of phonograph record covers from cut rectangular blanks of flat material comprising:

• a passageway for traveling of the blanks along a track in their longitudinal direction, said passageway equipped with
• a pair of abrading devices, each abrading device arranged on one side of the passageway to reduce the longitudinal edge portions of the blanks of flat material,
• a folding station adjacent the abrading devices for folding at least one longitudinal edge portion of the blank,
• a means for coating at least one longitudinal edge portion with adhesive material said means disposed adjacent to the folding station,
• a means for folding the blank about a transverse line,
• a bonding station for securing the longitudinal edge portions together, and
• a circular arc guideway for adjustment of the angular position of each abrading device without affecting the lateral position or the height of said abrading devices, arranged in the plane transverse to the direction of the passage and having the center of said guideway at the outer edge of the working range of said abrading devices,
• wherein the edge portions bonded together form a layer having a thickness in the area of the bonding of the same thickness as the unabraded blanks of material.

An apparatus for the continuous production of phonograph record covers from cut rectangular blanks of flat material comprising:

• a passageway for traveling of the blanks along a track in their longitudinal direction, said passageway equipped with
• a pair of abrading devices, each comprised of an abrading element, each abrading device arranged on one side of the passageway to reduce the longitudinal edge portions of the blanks of flat material,
• a folding station adjacent the abrading devices for folding at least one longitudinal edge portion of the blank,
• a means for coating at least one longitudinal edge portion with adhesive material said means disposed adjacent to the folding station,
• a means for folding the blank about a transverse line,
• a bonding station for securing the longitudinal edge portions together, and
• means for cyclic lifting of each abrading element from the working surface combined with an adjustment unit comprising:
• a carrier displaceably mounted on a scaled guideway attached along said passageway of the blanks, said guideway having a circular arc surface, the vertical tangent thereof being located in the transverse plane to the passageway,
• a support element adjustably guided along the circular arc guideway, said support element carrying a swivel mount location having an axis parallel to the plane of the circular arc, and
• a mounting arrangement for a drive motor and an independent abrading element bearing arrangement, said mount being supported with a variable swivel angle.

An apparatus for the continuous production of phonograph record covers from cut rectangular blanks of flat material comprising:

• a passageway for traveling of the blanks along a track in their longitudinal direction, said passageway equipped with
• a pair of abrading devices, each abrading device arranged on one side of the passageway to reduce the longitudinal edge portions of the blanks of flat material,
• a folding station adjacent the abrading devices for folding at least one longitudinal edge portion of the blank,
• a means for coating at least one longitudinal edge portion with adhesive material said means disposed adjacent to the folding station,
• a means for folding the blank about a transverse line,
• a bonding station for securing the longitudinal edge portions together,
• wherein the edge portions bonded together form a layer having a thickness in the area of the bonding of the same thickness as the unabraded blanks of material, and
• wherein each of said abrading devices comprise a rotating abrading element arranged such that the axis of rotation is approximately parallel to the direction of the passageway for the traveling of the blank.

An apparatus for the continuous production of phonograph record covers from cut rectangular blanks of flat material comprising:

• a passageway for traveling of the blanks along a track in their longitudinal direction, said passageway equipped with
• a pair of abrading devices, each abrading device arranged on one side of the passageway to reduce the longitudinal edge portions of the blanks of flat material,
• a folding station adjacent the abrading devices for folding at least one longitudinal edge portion of the blank,
• a means for coating at least one longitudinal edge portion with adhesive material said means disposed adjacent to the folding station,
• a means for folding the blank about a transverse line,
• a bonding station for securing the longitudinal edge portions together, and
• wherein each abrading device consists of an abrading element mounted on a bearing arrangement separate and independent from but cooperating with a drive motor by way of a flexible shaft coupling and being secured to the passageway by way of a moveable mounting
• wherein the edge portions bonded together form a layer having a thickness in the area of the bonding of the same thickness as the unabraded blanks of material.

An apparatus for the continuous production of phonograph record covers from cut rectangular blanks of flat material comprising:

• a passageway for traveling on the blanks along a track in their longitudinal direction, said passageway equipped with
• a pair of abrading devices, each abrading device arranged on one side of the passageway to reduce the longitudinal edge portions of the blanks of flat material
• a folding station adjacent the abrading devices for folding at least one longitudinal edge portion of the blank,
• a means for coating at least one longitudinal edge portion with adhesive material said means disposed adjacent to the folding station,
• a means for folding the blank about a transverse line,
• a bonding station for securing the longitudinal edge portions together, and
• a suction nozzle and dust precipitator provided in the working range of each abrading device to remove abraded waste material,
• a holddown arrangement for the cut blanks in the area of each abrading device,
• wherein said suction nozzle is equipped with elastic seals resting on said holddown arrangement, said elastic seals surrounding the working range of each abrading device.

An apparatus for the continuous production of phonograph record covers from cut rectangular blanks of flat material comprising:

• a passageway for traveling of the blanks along a track in their longitudinal direction, said passageway equipped with
• a pair of abrading devices, each abrading device arranged on one side of the passageway to reduce the longitudinal edge portions of the blanks of flat material,
• a folding station adjacent the abrading devices for folding at least one longitudinal edge portion of the blank,
• a means for coating at least one longitudinal edge portion with adhesive material said means disposed adjacent to the folding station,
• a means for folding the blank about a transverse line,
• a bonding station for securing the longitudinal edge portions together, and
• wherein on a side opposite one of the abrading devices a support roll and a transverse axle essentially parallel to the plane of the cut blanks are rotatingly supported.