Device for punching blanks out of a flat sheet
OwnerFranz Vosseninventor
Life of this patent
Estimating the term…
Abstract
A device for punching blanks out of a flat sheet, in particular packaging blanks consisting of cardboard or corrugated cardboard, using a punching tool that is mounted in a carrier plate and projects beyond the plate in the form of a blade or cutting line, in addition to profiled strips, consisting of a material of limited flexibility, which flank the tool. A rail-type profiled channel consisting of a rigid material is located on the carrier plate, running parallel to the punching tool on each side of the longitudinal faces of the latter and one cross-sectional area of the profiled strip is inserted into the profiled channel in a positive fit. In addition, at least one lateral face of the cross-section of the profiled strip has a protuberant base.
Claims14
1-14. (canceled)
15:
- A device for punching blanks from flat sheet comprising:
- a carrier plate having a bottom surface;
- a tool having longitudinal sides, the tool being mounted in the carrier plate and having a cutting edge which projects beyond the bottom surface of the carrier plate;
- a pair of channel profiles arranged on the carrier plate on either side of the longitudinal sides of the tool;
- a strip of flexible material mounted in each channel profile wherein each strip projects away from the bottom surface of the carrier plate beyond the cutting edge of the tool when the tool is in a non-working position.
16:
- The device as claimed in claim 15, wherein each strip of flexible material has an outwardly directed base bead on at least one side surface.
17:
- The device as claimed in claim 16, wherein the tool is flanked on either longitudinal side by the base bead on the strips.
18:
- The device as claimed in claim 16, wherein side surfaces of the strip are inclined inwards towards a profile center line (M).
19:
- The device as claimed in claim 18, wherein the center line (M) of the strip is a line of symmetry thereof.
20:
- The device as claimed in claim 15, wherein each channel profile has legs extending from a base which are provided with an inner undercut space.
21:
- The device as claimed in claim 20, wherein the inner space of the legs are curved inwards in cross section.
22:
- The device as claimed in claim 20, wherein the legs are angled in cross section and have hook bars at their ends, said hook bars pointing towards one another.
23:
- The device as claimed in claim 20, wherein the base of the channel profile is fixed to the carrier plate said carrier plate comprises wood.
24:
- The device as claimed in claim 23, wherein the base of the channel profile is fixed by a liquid adhesive.
25:
- The device as claimed in claim 24, wherein the base of the channel profile is provided with an adhesive layer.
26:
- The device as claimed in claim 25, wherein the adhesive layer is covered by a covering layer when not in use.
27:
- The device as claimed in claim 15, wherein the tool, in a section towards the legs of the channel profile, is provided with a cutting edge which points away from the latter, and said cutting edge is provided with notches made at a distance (i) from one another.