A marking instrument having a plurality of removable writing nibs serially aligned so that an operator can remove a spent or fluid-affected writing nib and, thereby, access a fresh writing tip.

A marking instrument having a plurality of removable writing nibs serially aligned so that an operator can remove a spent or fluid-affected writing nib and, thereby, access a fresh writing tip.

A writing instrument includes a barrel and a cap capable of being assembled with and secured to the barrel. The barrel carries a writing instrument. The cap carries a clip. A free end of the clip includes a detent that can be received by a corresponding indentation of an exterior surface of an external portion of the barrel when the cap is assembled with the barrel. The detent of the clip and the indentation of the barrel are capable of securing the cap and the barrel in their assembled relationship. The writing instrument may be compact. Methods of using a writing instrument include securing a cap of the writing instrument to a barrel of the writing instrument by causing a detent of a free end of a clip of the cap to engage a corresponding indentation of an exterior portion of the barrel.

Stylus pens with continuous long surface solid body between the stylus part and pen extrusion action pen body offer high stylus sensitivity. Such pens with top stylus function offer better visibility while writing. To achieve this, the surface discontinuity used in the action function is located far from stylus (discontinuity results in poor electrical conduction). One of the solutions is to have a twist action mechanism (without mating threads) requires a press fit design. Due to use of press fit manufacturing/function/useful life, a typical short mechanism was used thus limiting the cartridge (refill) size. A typical mechanism is used into this class of pens (as in FIGS. 2 & 5), which intern limited cartridge size (e.g FIG. 2 holds only 90 cubic mm). This patent will change the mechanism design, solve the issues and take advantage of full body size (case of FIG. 2 to hold 500% ink).

Stylus pens with continuous long surface solid body between the stylus part and pen extrusion action pen body offer high stylus sensitivity. Such pens with top stylus function offer better visibility while writing. To achieve this, the surface discontinuity used in the action function is located far from stylus (discontinuity results in poor electrical conduction). One of the solutions is to have a twist action mechanism (without mating threads) requires a press fit design. Due to use of press fit manufacturing/function/useful life, a typical short mechanism was used thus limiting the cartridge (refill) size. A typical mechanism is used into this class of pens (as in FIGS. 2 & 5), which intern limited cartridge size (e.g FIG. 2 holds only 90 cubic mm). This patent will change the mechanism design, solve the issues and take advantage of full body size (case of FIG. 2 to hold 500% ink).

A pen structure with a glass smasher has the glass smasher mounted at the front end of a pen. When a user holds the pen and presses the front end (i.e., the smashing cone) of the smashing rod of the glass smasher forcibly against a glass obstacle, an impact block will strike the rear section of the smashing rod vigorously such that the smashing cone is instantly driven to smash the glass obstacle. A ballpoint/rollerball refill is detachably provided in the pen and is at least 6 cm long in order to contain enough ink. The overall length of the pen is at least 10 cm so that the pen can be easily held while the user writes or draws with the ballpoint/rollerball tip and while the user applies a force to a glass obstacle through the front end of the smashing rod to smash the glass obstacle.

A pen structure with a glass smasher has the glass smasher mounted at the front end of a pen. When a user holds the pen and presses the front end (i.e., the smashing cone) of the smashing rod of the glass smasher forcibly against a glass obstacle, an impact block will strike the rear section of the smashing rod vigorously such that the smashing cone is instantly driven to smash the glass obstacle. A ballpoint/rollerball refill is detachably provided in the pen and is at least 6 cm long in order to contain enough ink. The overall length of the pen is at least 10 cm so that the pen can be easily held while the user writes or draws with the ballpoint/rollerball tip and while the user applies a force to a glass obstacle through the front end of the smashing rod to smash the glass obstacle.

A marking instrument having a plurality of removable writing nibs serially aligned so that an operator can remove a spent or fluid-affected writing nib and, thereby, access a fresh writing tip.

A marking instrument having a plurality of removable writing nibs serially aligned so that an operator can remove a spent or fluid-affected writing nib and, thereby, access a fresh writing tip.

A writing instrument extending along an axis and comprising a writing tip and an eraser, a first helical cam propelling mechanism configured to move the writing tip along the axis between a retracted position and a protruded position and a second helical cam propelling mechanism configured to move the eraser along the axis between a retracted position and a protruded position, the first helical cam propelling mechanism comprising a first cam follower and a first helical cam, the second helical cam propelling mechanism comprising a second cam follower and a second helical cam, each of the first cam follower, the first helical cam, the second cam follower and the second helical cam being provided on distinct elements.