with reference initially to fig1 and 2 , there is shown a mount or mounting assembly generally indicated at 10 , including a printer mount or printer holder generally indicated at 11 for a printer 12 and supply holder generally indicated at 13 . it is preferred that the holders 11 and 13 share a common base 14 . fig1 shows the printer 11 held by the printer holder 11 and latched in its held position while fig2 shows the printer 12 aligned with the holder 11 . the printer 12 is like the printer illustrated and described in u . s . pat . no . 6 , 241 , 407 , but other and different printers may be mounted on and latched to the mounting assembly 10 . the disclosure of u . s . pat . no . 6 , 241 , 407 is incorporated by reference in its entirety . as is evident from fig1 and 2 , the holder 11 includes side panels 15 and 16 which straddle and confine the printer 12 , and a connecting bottom or end panel 17 . the printer 12 is latched to the printer holder 11 by at least one and preferably two latches generally indicated at 18 . the end panel 17 is connected to the base 14 by an upstanding panel 19 which holds the end panel 17 in generally parallel spaced relation to the base 14 . the panel 19 is connected to the base 14 at a bend 20 and to the end panel 17 at a bend 21 . the side panels 15 and 16 are joined to the end panel 17 at bends 22 and 23 . a portion of the base 14 is cut and bent at a bend 14 ′ as best shown in fig6 and 7 to form a guide and retainer member 24 having a guide portion 25 generally parallel to the base 14 . the guide portion 25 has a lower guide surface 26 which is slightly above upper surface 27 of the base 14 for guiding a web w . the member 24 has an upstanding retainer portion 28 joined to the guide portion 25 at a bend 29 . upper end 30 of the retainer portion 28 prevents a data cord connector 31 from becoming dislodged from the printer 12 by providing a stop . thus , the unitary member 24 serves the dual function of guiding the web w and of preventing the data cord connector 31 from becoming dislodged from the printer 12 during use . as shown in fig1 through 4 and 6 , there are two cord holders 32 and 33 for holding respectfully a data cord 34 and a power cord ( not shown ) to power the printer from a source of low voltage electricity by a transformer ( not shown ). the holder 32 has two outwardly extending bent tabs 35 that straddle an inwardly bent tab 36 . likewise , the holder 33 has two outwardly extending bent tabs 37 that straddle an inwardly bent tab 38 . the data cord 34 is woven around the tabs 35 and 36 , and likewise the power cord is woven around tabs 37 and 38 . the connecting panel 19 is shown to have two t - shaped retaining slots 39 and 40 . the slot 39 is for the data cord 34 and the slot 40 is for the power cord or vice versa . the side panels 15 and 16 have respective projections 15 ′ and 16 ′ formed by cutting and bending out small pieces of the panels 15 and 16 . the side panels 15 and 16 also have bent - over tabs 41 and 42 . identical latch members 18 ′ of the latches 18 are captive between the panel 15 and its tab 41 and the panel 16 and its tab 42 . the projections 15 ′ and 16 ′ extend into vertical slots 43 in the latch members 18 ′. the projection 15 ′ and 16 ′ guide the latch members 18 ′ for vertical movement . headed pins 44 pass through openings 45 in the latch members 18 and are secured in the side plates 15 and 16 , respectively , by e - rings 46 . the heads of the pins 44 also help to retain and guide the latch members 18 ′ for vertical movement . the side panels 15 and 16 have horizontal open - ended slots or cutouts 47 to receive shafts 48 ′ of headed projections 48 disposed on opposite sides of the printer 12 . the latch members 18 ′ have hook - shaped configurations with enlarged openings 49 leading to throat openings 50 . the throat openings 50 are large enough to receive the projections 48 when the latch members 18 ′ are in their raised positions . in the raised positions , the projections 48 are aligned with and centered with respect to the throat openings 50 . when loading the printer 12 onto the mounting assembly 10 , for example upon inward movement from the fig2 position to the fig1 position , the projections 48 pass readily through the throat openings 50 into the openings 49 . when the latch members 18 ′ are moved vertically downward , the projections 48 are captured by the latch members 18 ′, in particular by portions 51 which prevent the projections 48 from outward movement . the openings 45 in the latch members 18 ′ can have at least two and preferably three lobes as best shown in fig5 . when the latch member 18 ′ is in the lowered position , the pin 44 is in a lobe 45 c . the latch member 18 ′ is provided with two vertically extending through slots adjacent the opening 52 . there is a scalloped wall 53 between each slot 52 and the opening 45 . in that each latch member 18 ′ is preferably constructed of plastics material which has a certain flexibility and resilience , when the latch member 18 ′ is moved vertically so that the pin 44 moves toward the lobe 45 b , the walls 53 flex outwardly away from each other until the pin 44 is embraced within the lobe 45 b . to move the latch member 18 ′ to where the throat opening 50 is aligned with the projection 48 , the user pushes upwardly on the surface 54 until the pin 44 is received in the lobe 45 a . the ridges 53 ′ between the lobes 45 a and 45 b , and the ridges 53 ′ between the lobes 45 b and 45 c releasably retain the latch members 18 ′ in the positions to which they were moved . the construction of the flexible resilient scalloped walls 53 cooperating with the stationary pin 44 provide a detent generally indicated at 55 . the latch members 18 ′ cooperating with their respective side panels 15 and 16 , tabs 41 and 42 , tabs 15 ′ and 16 ′ and pins 44 provide the latches 18 . the latches 18 , detented by detents 55 , positively hold the printer 12 latched to the printer holder 11 , and yet the latches 18 can be unlatched manually by sliding the latch members 18 ′ vertically upward . with reference to the supply holder 13 shown in fig1 and 3 for example , there is shown an upright mounting member or panel 56 formed by cutting and bending up a portion of the base 14 . the member 56 makes a preferably right - angled bend 57 with the base 14 so that the member 56 extends vertically . to help maintain the member 56 in position , a triangular gusset plate 58 is welded or otherwise secured to the base 14 and to the member 56 . the member 56 has a standoff or integral bracket 59 which includes a horizontal portion 60 joined to the upright portion of the member 56 at a bend 61 and a vertical portion 62 joined to the horizontal portion 60 at a bend 63 . the vertical portion 62 has a round hole 64 . a holder member or slide 13 ′ has a generally inverted u - shaped configuration with a leg portion 13 a and a leg portion 13 b joined by a connecting or bight portion 13 c . the leg portion 13 a has an elongate vertically extending slot 66 aligned with the holes 64 and 65 . the leg portion 13 a also has a pair of bent over tabs 67 that embrace the panel 56 . a shaft or rod generally indicated at 68 has an end portion with a right - angled bend 69 , a large diameter shaft portion 70 and a small diameter shaft portion 71 . the shaft portion 71 has a groove 72 to receive an e - ring 73 . the shaft 68 carries a roll or spool 74 . the spool 74 includes a tubular hub portion 75 and a disc 76 secured to the hub portion 75 . the shaft 68 extends through the hub portion 75 and the disc 76 , through the slot 66 , and through the holes 64 and 65 . the shaft portion 71 receives a compression spring 77 and a washer 78 outboard of the vertical portion 62 . fig3 a and 3b show the transition between the shaft portions 70 and 71 . the marginal end of the shaft portion 70 has opposed flats 79 shown to extend horizontally . the flats 79 are normally against the upper and lower flat edges 65 ′ of the hole 65 , as best shown in fig3 a . the compression spring urges the shaft 68 to the right as viewed in fig3 and 3a so that shoulders 80 bear against the mounting member 56 . the leg portion 13 b has a horizontal elongate slot 81 with which the bent - over end portion 69 is aligned as best shown in solid lines in fig2 . however , by pushing on the e - ring 78 or a suitable knob ( not shown ) that can be substituted for the e - ring 78 , the flats 79 clear the hole 65 and the shaft 68 can be manually rotated 180 from the unlatched solid line position shown in fig2 to the latched solid line position shown in fig4 and the phantom line position shown in fig2 . when the shaft 68 has been thus rotated , the user can cease pushing on the e - ring 73 and the shaft 68 moves to the right in fig3 and 3a until the shoulders 80 abut against the mounting member 56 , thereby holding the shaft 89 in the latched position . the spool 74 can rotate freely about the shaft 68 . the hub portion 75 of the spool 74 readily receive the central core c of the roll r . it is preferred to have the leg portion 13 b make an angle a of greater than 90 with respect to the bight portion 13 c to hold the leg portion 13 b against the end position 69 . especially with a large roll r , the holder member 13 ′ can flex resiliently to an angle greater than angle a when loading the roll r onto the shaft portion 75 . in order to load the roll r onto the spool 74 the leg position 13 b springs slightly outwardly ( clockwise as viewed in fig3 ) until the end portion 69 of the shaft 68 clears the slot 81 . thereupon , the slide 13 ′ is raised manually , and the roll r is inserted onto the shaft portion 75 of the spool 74 . then the slide 13 ′ is lowered until the shaft 68 is aligned with the slot 81 . thereupon , the shaft 68 can be pushed to the left as seen in fig3 until the flats 79 clear the non - circular hole 65 and upon rotation of the shaft 68 to the phantom line position shown in fig2 , the shaft 68 is released and the spring 77 re - establishes the locking of the shaft 68 when the flats 79 cooperate with the horizontal edges 65 ′ of the hole 65 . the mounting assembly 10 can be disposed in any position , such as on a table or bench , on a vertical wall , or on an overhead structure such as safety rails 82 of a forklift truck . fig3 and 7 especially show how the mounting assembly may be mounted to structure such as a forklift truck . a plate 83 can be positioned against the upper surfaces 84 of the rails 82 . threaded fasteners 85 can pass through holes 86 in a sheet metal plate 87 and are threadably received in threaded holes or fasteners 88 in the base 14 . alternatively , the mounting assembly 10 may be bolted to a table , bench or wall . other embodiments and modifications of the invention will suggest themselves to those skilled in the art , and all such of these as come within the spirit of this invention are included within its scope as best defined by the appended claims .