Patent ID: 6938343

Claim:
A package-opening cutter comprising: an angled ruler; retaining portions provided on both sides of said angled ruler and each having an opening; a clamp body provided so as to be pushed into and pulled out of said opening of either one of said retaining portions for clamping a cutter blade; and a locking arrangement for locking said clamp body in said opening of either one of said retaining portions; wherein said locking arrangement includes a hole formed in each of said retaining portions, extending from an outer surface thereof to said opening thereof, and being elongated in a first direction, an elongated engaging member, a knob, and a shaft connecting said elongated engaging member to said knob, and an elongated cutout formed in said clamp body such that, when said clamp body is disposed in said opening of either of said retaining portions, said cutout is elongated in a second direction which is different than said first direction; wherein said locking arrangement is configured such that, when said clamp body is disposed in said opening of one of said retaining portions, said elongated engaging member is engageable in said elongated cutout by inserting said elongated engaging member through said hole of the respective retaining portion to cause said engaging member to be disposed in said opening of the respective retaining portion and to cause said knob to remain exposed at an outer surface of the respective retaining portion, turning said knob by a predetermined angle, and sliding said knob in said first direction to cause said shaft to slide within said hole such that said engaging member engages in said cutout.