Tape dispenser with a hidden blade

• US 6,789,594 B1
• Filed: 04/25/2003
• Issued: 09/14/2004
• Est. Priority Date: 04/25/2003
• Status: Active Grant

• Current Assignee: Hsiu-Man Yu Chen
• Original Assignee: Hsiu-Man Yu Chen
• Inventors: Yu Chen, Hsiu-Man
• Primary Examiner(s): Crispino, Richard
• Assistant Examiner(s): Hawkins, Cheryl N.
• Application Number:
  US10/422,910
• Time in Patent Office: 508 Days
• Field of Search: 156/523, 156/574, 156/577, 156/579, 156/527, 156/576, 225/19, 225/20, 225/56, 225/72, 225/77, 225/89, 225/91
• US Class Current: 156/523
• CPC Class Codes: B65H 2407/10 Safety means, e.g. for preventing injuries or illegal operations
• CPC Class Codes: B65H 35/0026 for delivering pressure-sensitive adhesive tape
• CPC Class Codes: B65H 35/0086 using movable cutting elements
• CPC Class Codes: Y10T 156/1348 Work traversing type
• CPC Class Codes: Y10T 156/1795 Implement carried web supply
• CPC Class Codes: Y10T 156/18 Surface bonding means and/or assembly means with handle or handgrip
• CPC Class Codes: Y10T 225/215 With blade-edge guard
• CPC Class Codes: Y10T 225/216 Movable
• CPC Class Codes: Y10T 225/257 Blade mounted on hand-held wound package

Abstract

A tape dispenser with a hidden blade includes a body, a press plate provided at a front side of the body and possible to be pressed to move rearward elastically to push down a blade fixed on a blade base to force the blade to protrude out of the body a little for cutting a tape. After the tape is cut and the press plate is released manually, the blade with the blade base together is raised up to the original position elastically and automatically, kept safe to use and prevented from damage by accidental collision by something.

Claims

1. A tape dispenser with a hidden blade comprising a body, a tape cylinder supporter formed behind said body for fitting a tape cylinder for a tape thereon, a cover formed integral with said body to cover said tape cylinder supporter, a blade positioned in a front side of said body for cutting a tape;

and,

characterized by said body having two side plates formed parallel in the front portion, a press plate positioned movably back and forth in the front side and an upper side between said two side plates, said press plate having two actuating walls formed to extend rearward on a rear surface of a vertical portion, a blade-base positioning member provided under a horizontal portion of said press plate between an upper portion of the space defined by said two side plates, a blade base fixed on a front surface of said blade-base positioning member, said blade base pushed normally by elasticity, a blade fixed on a front surface of said blade base, a sloped surface formed in an upper side of said blade base to contact with lower sloped surfaces of said two actuating walls, said blade fixed on said blade base pushed down to extend down through said body for cutting a tape and to be raised again to its original position elastically.

2. The tape dispenser with a hidden blade claimed in claim 1, wherein a press-plate positioning member has two press-plate insert grooves formed spaced apart in a front surface and two position-limiting slide grooves spaced apart in an upper surface, said press plate has two ears formed spaced apart at two ends of a rear end of a horizontal portion so that said press plate may move a limited distance by means of two guide bars fitting with said press-plate insert grooves of said press-plate positioning member and said ears and said position-limiting slide grooves fitted in by pins.

3. The tape dispenser with a hidden blade as claimed in claim 1, wherein a press-plate positioning member and a two guide bars have respectively corresponding spring grooves and corresponding spring positioning projections so a press-plate spring may be positioned between the both in order to elastically push said press plate outward always.

4. The tape dispenser with a hidden blade as claimed in claim 1, wherein a recessed spring groove is provided respectively and correspondingly in a center portion of said blade-base positioning member and of said blade base, a spring positioning member is formed at an upper end and a lower end of said spring groove so that a spring is positioned between said two spring positioning members in order to push elastically upward always.

5. The tape dispenser with a hidden blade as claimed in claim 1, wherein said two side plates of said body respectively have a press-plate guide slot lengthwise and respectively in their inner surfaces, said press plate has two slide blocks respectively at two opposite sides of a lower end of the vertical portion, and said press plate is combined with said two side plates by means of said two slide blocks fitting movably in said two press-plate guide slots.

6. The tape dispenser with a hidden blade as claimed in claim 1, wherein said blade-base positioning member has two vertical slide grooves in two sides of a front surface, said blade base has two slide blocks on a rear surface correspondingly fitting movably in said two vertical slide grooves to enable said blade base to slide a limited distance relative to said blade-base positioning member.