Abstract:
A multi-element pen, particularly a pen with twin heads containing at least three operating elements for writing, correction or marking, allowing the user use only one pen for writing and correction. The pen includes a body that houses three or more ink-storage rooms and operating elements of different applications, each operating element corresponding an ink-storage room. Different writing inks or correction liquid contained in the ink-storage rooms enables the use different operating elements for writing, correction or marking, allowing the user carry only one pen for writing, correction and marking.

Description:
BACKGROUND OF THE INVENTION 
     While it is a common practice to have more than 1 pen plus correction liquid for different writing, recording, taking note or revision, none of the multi-purpose pens, including the correction pens with refilling correction liquid remain available only for pens of only one purpose. The conventional white-ink correction liquid currently available on the market that allows rewriting on it using ordinary inks contains toxic gases that are harmful to human beings. On the other hand, when applied, the writer must wait until it becomes dry before keeping on writing and, the dried bumpy material troubles the handwriting too. Consequently, environmental correction liquids made of nontoxic substances have become available; having no defects and toxic substances the conventional white-color correction liquids do as the correction liquid itself decomposes the original ink and allows a second writing using a special ink. This is to say, to use the new correction liquid, the user must carry a pen containing the correction liquid and separate a case and a pen that contains the special ink. The pens of different applications the user is supposed to carry would bother the user when it comes to handiness. 
     The twin-bead pens, mostly markers, available on the market are for 2 purposes and do not meet physical needs. The ball pens of 6˜12 colors come with a very complicated mechanism controlling the pop-out, snap-in of the different leads, besides the thick tube makes it inconvenient to carry. 
     SUMMARY OF THE INVENTION 
     The multi-element pen referred in this invention relates to a pen containing aquatic ink or correction refill liquid including a body that contains on the inside and both ends at least 3 storage rooms for inks and the writing and correction elements in equal number of the storage rooms, each corresponding to a storage assembly forming an operating unit which, by means of the different writing inks and the non-toxic environmental correction liquids contained in the storage rooms, defines the different operating units for writing, correction and re-writing, thus allowing the user to carry only one pen with different operating units to fulfill writing, correction and re-writing on correction spots using the special ink. 
    
    
     BRIEF DESCRIPTION OF DRAWINGS 
     FIG. 1 is an exploded perspective view of the first embodiment of the invention. 
     FIG. 2 is an exploded cross-sectional view of the first embodiment of the invention. 
     FIG. 3 is an exploded cross-sectional view of the first embodiment of the invention. 
     FIG. 4 is an exploded cross-sectional view of the second embodiment of the invention. 
     FIG. 5 is an assembled cross-sectional view of the second embodiment of the invention. 
     FIG. 6 is an exploded cross-sectional view of the third embodiment of the invention. 
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
     As shown in FIGS. 1-3, the first embodiment of this invention includes a pen structure consisting of body  1 , element  2  and caps  3 ,  4  (as shown in FIG.  2 ), where: 
     Body  1  (as shown in FIG. 2) includes a hollowed pen tube  11  and two ends  12 ,  13  of the pen tube  11  are formed with unequal inner diameters. Between the two ends,  12 ,  13  of the unequal inner diameters the streamlined pen tube  11  is formed for easy carrying or holding in a user&#39;s pocket. The hollowed pen tube  11  has its inner diameter partitioned to house three storage rooms  14 ,  15  and  16 . To match the different inner diameters of the hollowed pen tube  11 , the first storage room  14  is placed separately in the pen tube  11  near the tapered end  12  and, on the tube end  12 , there is the opening  141  of the first storage room  14 . The second and third storage rooms  15  and  16  are placed in parallel in the pen tube  11  near the end  13  of larger inner diameter, forming openings  151 ,  161  of the second and third storage rooms  15 ,  16  on the tube tip  13 . On the tips of the two ends  12  and  13 , the recessed necks  121 ,  131  are formed, allowing the positioning of caps  3 ,  4 . 
     The three aforementioned storage rooms  14 ,  15  and  16  are provided with a depth of not more than the half of the overall length of the pen tube  11 , for storage of ink in equal volume or unequal volume. To make the physical use easier, the first storage room  14  shall be defined as the larger storage room for ordinary writing ink and the second and the third storage rooms  15 ,  16  shall be respectively defined as smaller storage rooms for correction liquid and rewriting ink as an ordinary consumer may demand. 
     The correction liquid filled in said second storage room  15  can be an ordinary white-color correction liquid. In this embodiment, we would propose the use of the transparent, non-toxic and environmental correctional liquid. The use of this correction liquid allows immediate rewriting after erasing ordinary ink without having to wait for it to dry and no bumpy paint or toxic substance remains or is produced. Only the rewriting shall be made using the special ink. 
     The aforementioned operating unit  2  (as shown in FIG. 2) includes two writing elements  21 ,  22  for ordinary writing and rewriting after erasing, respectively, and, the erasing element  23  for ordinary writing ink. 
     The two writing elements  21  and  22  may have the same structure. Said writing unit  21  has a writing element  211  that can be a steel ball pen tip, ball pen tip or a pen. In this embodiment, a steel ball pen tip is used. An ink guide core  213  is in connection with the end of the writing element  211  inserted into the storage rooms  14  or  16  to suck ink for the use of the writing element  211 . A sealing kit  212  is located between the writing element  211  and the ink guide core  213  to link the writing element  211  and the ink guide core  213 . 
     Said correction element  23  can be a known marker or the correction writing element of a marker. Correction element  23  has a correction element  231  with its end inserted and positioned into a sealing element  232  while the other end of the sealing element  232  has an ink guide core  233  in connection with the correction element  231  for the supply of correction ink. By means of direct matching of the sealing element  232  with the storage room  15 , the ink guide core  233  can be inserted into the second storage room  15  to absorb the correction liquid. 
     The caps  3 ,  4  are connected to tube ends  12 ,  13  in the corresponding tube  11  and the recessed necks  121 ,  131 . When either of the two caps  3 ,  4  are removed, they can be linked to the other end cap (as shown in FIG. 3) so they will not get lost. Again cap  4  may cover the writing element  22  and the correction element  23  as shown in FIG. 1, or the pair of writing elements  21 ,  22  and the correction element  23  may have individual caps. 
     Said assembly forms a pen with ordinary writing, correction and rewriting features (as shown in FIGS. 1,  2 ). When the user needs to correct mistakes writing with the writing element ( 21 ) using ordinary ink (as shown in FIG.  3 ), all he/she has to do is open the cap  4  and erase the mistake using the correction element  231  before re-writing with the special ink in the writing element  22 . 
     As shown in FIGS. 4 and 5, another embodiment of this invention and the structure of an ink cartridge is illustrated The structure includes a pen  1 , the element  2  and the caps  3 ,  4 , where: 
     Pen body  1  includes a hollowed pen tube  11  that has three storage rooms  14 ,  15  and  16  between the two ends  12 ,  13  of unequal inner diameters. The three ink storage rooms  14 ,  15  and  16  have openings  141 ,  151  and  161  in the tube ends  12  and  13  having threads  142 ,  152  and  162 . On the two ends  12 ,  13 , there are recessed necks  121 ,  131  to position the caps  3  and  4 . 
     The structure of the two writing elements  21  and  22  includes writing element  211  as in the aforementioned embodiment, can be a steel ball pen tip, ball pen tip or a pen. In this embodiment, a pen is illustrated. The writing elements include a sealing element  212  that corresponds to one of the openings  141 ,  161 , with threads  214  (as shown in FIG. 4) on the outer wall, allowing the sealing elements  212  to engage ends  12 ,  13 . In the sealing element  212 , there is an ink guide core  213  that links the cartridge ink tube  5  through the cartridge tube  215  on the tip of the sealing element  212 . At the same time, the cartridge ink tube  5  is contained in the storage rooms  14  and  16 , where the writing element  211  and sealing element  212  can be easily removed for the replacement of the cartridge ink tube  5 . 
     The structure of said correction element  23 , includes the erasing element  211  as in the aforementioned embodiment. On one end of the sealing element  232 , there are threads  234  (as shown in FIG. 4) on the outer wall, allowing the sealing element  232  be a free threading element in the storage room  15 . In the sealing element  213 , there is an ink guide core  233  that links the cartridge ink tube  5  containing non-toxic environmental transparent correction liquid through the cartridge tube  5  on the tip of the sealing element  232 . At the same time, the cartridge ink tube  5  is contained in the storage room  15 , where the writing element  231  and sealing element  232  can be easily removed for the replacement of the cartridge ink tube  5 . 
     The assembled structure provides a handy pen with two elements on the one end and, one on the other, the storage of ink in the cartridge ink tube  5  and the threading of the sealing elements  212  and  232  to allow easy replacement of element  2  and the cartridge ink tube  5 . 
     FIG. 6 shows a third embodiment containing four elements for ordinary writing, correction, rewriting and marker or a note pen. The element  2  of the pen may feature the writing element  21  or correction element  23  or marking element. Likewise, element  2  comes with a sealing element  212 , with one end containing, depending on the application, writing element  211  or erasing element  231 . The sealing element  212  may include direct sealing elements in the storage rooms  14 ,  15 ,  16  and  17  as shown in the first embodiment, or threads as shown in the second embodiment. 
     Body  1  includes a hollowed pen tube  11 , of which the hollowed inner diameter provides four storage rooms  14 ,  15 ,  16  and  17 , where the first and the fourth storage rooms  14  and  17  are placed in parallel near the tube end  12 , with the tube end  12  having openings of the first and the fourth storage rooms  14  and  17  for securing of two elements  2 . The second and the third storage rooms  15  and  16  are placed in parallel near the tube end  13  of pen tube  11 , with the tube end  13  forming the second and the third storage rooms with openings that are secured (by direct sealing or threaded sealing) with two elements  2 . On the ends  12  and  13  of the tubes, there are recessed necks  121  and  131  to position caps  3 , and  4 .