Letter opener
OwnerDieter Haageinventor
Life of this patent
Estimating the term…
Abstract
A device for opening envelopes which comprises a rotatable shaft having an elongate recess in line with the axis of the shaft. A first cutting blade is located on the top edge of the recess and a second cutting blade is secured to a base which supports the shaft. The first and second blades are positioned such that they co-act in a shearing action on rotation of the shaft. To open an envelope, the edge of the envelope is positioned within the recess and the shaft is rotated causing the blades to co-act resulting in a sliver being cut from the envelope.
Claims9
A device for opening an envelope comprising a cylindrical shaft rotatably mounted at both ends to a base to enable the shaft to rotate between a first and a second position, the base being located adjacent the shaft and extending between the ends of the shaft, actuation means operable on the shaft for rotating the shaft between the first and second positions, an elongate recess located in the shaft substantially in line with the axis of the shaft and having a first cutting blade on an outer edge of the recess, a second cutting blade rigidly secured to the base and positioned to coact with the first cutting blade in a shearing action as the shaft rotates from the first to the second position, the recess having a pre-determined depth enabling an edge of an envelope to be inserted between the first and second blades into the recess to a depth such that upon activation of the actuation means, to rotate the shaft from the first to the second position, a thin sliver is cut from the envelope, the device further comprising clamping means secured to the shaft above the recess, the clamping means having an outer end, supporting an engaging surface which is aligned substantially parallel to the base, which extends over the recess, wherein when the shaft rotates from the first to the second position, the clamping means rotates therewith and clamps a said envelope inserted into the recess between the engaging surface and the base prior to said thin sliver being cut from the envelope.
A device for opening an envelope comprising a cylindrical shaft rotatably mounted at both ends to a base to enable the shaft to rotate between a first and a second position, the base being located adjacent the shaft and extending between the ends of the shaft, actuation means operable on the shaft for rotating the shaft between the first and second positions, an elongate recess located in the shaft substantially in line with the axis of the shaft and having a first cutting blade on an outer edge of the recess, a second cutting blade rigidly secured to the base and positioned to co-act progressively with the first cutting blade from one end thereof in a shearing action, the recess having a pre-determined depth enabling an edge of an envelope to be inserted between the first and second blade into the recess to a depth such that upon activation of the actuation means, to rotate the shaft from the first to the second position, a thin sliver is cut from the envelope, the device further comprising clamping secured to the shaft above the recess, the clamping means having an outer end, supporting an envelope engaging surface that extends substantially parallel to said base, which extends over the recess, wherein when the shaft rotates from the first to the second position, the clamping means rotates therewith and clamps a said envelope inserted into the recess between the envelope engaging surface and the base prior to said thin sliver being cut from the envelope.
Dependencies are inferred from the claim text.