什么是(shi)裹背(bei)(bei)條，裹背(bei)(bei)條是(shi)通(tong)過皮殼機等機械用于(yu)精(jing)裝書(shu)(shu)(shu)本的(de)書(shu)(shu)(shu)脊(ji)部分，使書(shu)(shu)(shu)貼連接得更(geng)加牢固。書(shu)(shu)(shu)脊(ji)制作弧(hu)長(chang)的(de)計算，本器規(gui)格(ge)(ge)依書(shu)(shu)(shu)芯幅面大小進(jin)行調定，以能將書(shu)(shu)(shu)芯平(ping)穩地(di)送(song)進(jin)夾書(shu)(shu)(shu)裝置內為標準。入本后(hou)的(de)書(shu)(shu)(shu)冊不(bu)斜歪，四角垂直地(di)頂齊(qi)在(zai)夾書(shu)(shu)(shu)裝置的(de)靠板、側規(gui)內。裁(cai)切尺寸正確一致(zhi)，其質量要求與(yu)規(gui)格(ge)(ge)誤差與(yu)一般切書(shu)(shu)(shu)相(xiang)同。

夾書(shu)簽絲帶裝置安放在切書(shu)機與(yu)扒圓起(qi)脊機之間。即將(jiang)切完的書(shu)芯，用分本器(qi)從中(zhong)(zhong)間分開，再(zai)由輸放絲帶器(qi)將(jiang)絲帶夾入中(zhong)(zhong)心紙書(shu)芯的中(zhong)(zhong)間靠訂縫一邊(bian)(bian)。絲帶夾在書(shu)芯內兩端各留出粘邊(bian)(bian)和使用的余地，再(zai)經切刀（剪(jian)刀式(shi)）將(jiang)其剪(jian)斷。

剪斷后(hou)(hou)的絲(si)(si)帶(dai)(dai)，裹背(bei)條芯(xin)(xin)部分被下面(mian)膠輥著膠、壓實完成(cheng)夾書(shu)(shu)(shu)(shu)簽絲(si)(si)帶(dai)(dai)過程。書(shu)(shu)(shu)(shu)簽絲(si)(si)帶(dai)(dai)的長度(du)與一般手工(gong)(gong)(gong)加工(gong)(gong)(gong)長度(du)基本相(xiang)同，可(ke)依(yi)書(shu)(shu)(shu)(shu)冊(ce)幅(fu)面(mian)長度(du)調定。扒(ba)圓(yuan)起(qi)(qi)脊(ji)(ji)操作及要求。書(shu)(shu)(shu)(shu)芯(xin)(xin)經裁切(qie)、夾粘絲(si)(si)帶(dai)(dai)（或(huo)(huo)不夾粘絲(si)(si)帶(dai)(dai)）后(hou)(hou)，繼續傳送（或(huo)(huo)翻轉變位）并做(zuo)90°翻轉，使平(ping)放書(shu)(shu)(shu)(shu)芯(xin)(xin)變為(wei)后(hou)(hou)背(bei)朝(chao)(chao)上（或(huo)(huo)朝(chao)(chao)下）而(er)進入扒(ba)圓(yuan)起(qi)(qi)脊(ji)(ji)機。扒(ba)圓(yuan)起(qi)(qi)脊(ji)(ji)機的加工(gong)(gong)(gong)，其(qi)操作分為(wei)兩步(bu)，但(dan)機器的結構是連在(zai)(zai)一起(qi)(qi)的，均是先扒(ba)圓(yuan)后(hou)(hou)起(qi)(qi)脊(ji)(ji)。扒(ba)圓(yuan)。扒(ba)圓(yuan)起(qi)(qi)脊(ji)(ji)機在(zai)(zai)扒(ba)圓(yuan)時，由一組（或(huo)(huo)一對）圓(yuan)輥，將書(shu)(shu)(shu)(shu)芯(xin)(xin)壓緊后(hou)(hou)作相(xiang)對旋轉動作），使書(shu)(shu)(shu)(shu)背(bei)扒(ba)成(cheng)適(shi)當規格圓(yuan)勢(shi)，加工(gong)(gong)(gong)成(cheng)圓(yuan)背(bei)書(shu)(shu)(shu)(shu)芯(xin)(xin)。書(shu)(shu)(shu)(shu)芯(xin)(xin)書(shu)(shu)(shu)(shu)背(bei)的形狀(zhuang)分為(wei)圓(yuan)背(bei)有脊(ji)(ji)、圓(yuan)背(bei)無脊(ji)(ji)和(he)方背(bei)（或(huo)(huo)稱平(ping)背(bei)）三(san)種(zhong)。平(ping)裝裹背(bei)條書(shu)(shu)(shu)(shu)刊(kan)的書(shu)(shu)(shu)(shu)脊(ji)(ji)不高出(chu)書(shu)(shu)(shu)(shu)芯(xin)(xin)平(ping)面(mian)，而(er)精裝書(shu)(shu)(shu)(shu)刊(kan)的書(shu)(shu)(shu)(shu)脊(ji)(ji)一般要高出(chu)書(shu)(shu)(shu)(shu)芯(xin)(xin)的平(ping)面(mian)。書(shu)(shu)(shu)(shu)脊(ji)(ji)分為(wei)真(zhen)脊(ji)(ji)和(he)假脊(ji)(ji)。

真脊(ji)是(shi)利用(yong)書(shu)(shu)背(bei)上下(xia)兩邊變形的(de)(de)(de)弧度(du)(du)高出書(shu)(shu)芯平(ping)面；假脊(ji)則是(shi)利用(yong)紙板鑲在書(shu)(shu)背(bei)后形成的(de)(de)(de)書(shu)(shu)脊(ji)，書(shu)(shu)脊(ji)的(de)(de)(de)脊(ji)高等于封(feng)面紙板的(de)(de)(de)厚度(du)(du)。方背(bei)書(shu)(shu)芯。是(shi)指書(shu)(shu)芯的(de)(de)(de)書(shu)(shu)背(bei)平(ping)直方正(zheng)。書(shu)(shu)背(bei)不(bu)突出，與平(ping)裝書(shu)(shu)刊的(de)(de)(de)書(shu)(shu)背(bei)基本相(xiang)似。

背(bei)(bei)(bei)(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)上下環(huan)襯互成(cheng)直角，由于(yu)精裝(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)是用鎖線訂訂連，每一(yi)個書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)的(de)(de)(de)訂口折縫里面(mian)都用線串過，因此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)背(bei)(bei)(bei)(bei)脊(ji)(ji)(ji)(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)其(qi)它部(bu)(bu)分要(yao)厚(hou)一(yi)些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)的(de)(de)(de)帖(tie)數越多，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)背(bei)(bei)(bei)(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)其(qi)它部(bu)(bu)分厚(hou)度(du)的(de)(de)(de)差別也越大(da)。所以方背(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)的(de)(de)(de)形(xing)(xing)式一(yi)般只用于(yu)厚(hou)度(du)約為20mm的(de)(de)(de)精裝(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)。圓背(bei)(bei)(bei)(bei)有(you)(you)脊(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)。圓背(bei)(bei)(bei)(bei)有(you)(you)脊(ji)(ji)(ji)(ji)又(you)稱圓背(bei)(bei)(bei)(bei)真脊(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)背(bei)(bei)(bei)(bei)部(bu)(bu)呈圓弧形(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)高起有(you)(you)脊(ji)(ji)(ji)(ji)壟，堅(jian)硬挺實，這種書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)的(de)(de)(de)形(xing)(xing)式適合(he)于(yu)裝(zhuang)(zhuang)訂較厚(hou)的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)，裝(zhuang)(zhuang)上書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)(ke)后有(you)(you)明顯的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻閱方便(bian)。目前我國的(de)(de)(de)精裝(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)多采用這種圓背(bei)(bei)(bei)(bei)有(you)(you)脊(ji)(ji)(ji)(ji)的(de)(de)(de)加工形(xing)(xing)式。圓背(bei)(bei)(bei)(bei)無脊(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)。圓背(bei)(bei)(bei)(bei)無脊(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)又(you)稱圓背(bei)(bei)(bei)(bei)假脊(ji)(ji)(ji)(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)背(bei)(bei)(bei)(bei)部(bu)(bu)呈圓弧形(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)的(de)(de)(de)厚(hou)度(du)相同(tong)，堅(jian)實挺括，但沒有(you)(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)(bei)條脊(ji)(ji)(ji)(ji)。這種形(xing)(xing)式的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)，一(yi)般常與(yu)軟質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)(ke)或塑(su)料(liao)壓(ya)制而成(cheng)的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)(ke)相配(pei)套。中(zhong)心紙有(you)(you)些機器還沒有(you)(you)沖圓裝(zhuang)(zhuang)置，即將(jiang)方背(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先進行沖圓加工，作初(chu)步定型(xing)。先根據書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)厚(hou)度(du)和中(zhong)心紙幅面(mian)大(da)小(xiao)調定好夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器及扒(ba)圓輥(gun)（或沖圓裝(zhuang)(zhuang)置）的(de)(de)(de)規(gui)矩(ju)，再使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)進入夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器內(nei)并送到(dao)扒(ba)圓輥(gun)之(zhi)間(jian)，將(jiang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)扒(ba)擠成(cheng)一(yi)定圓勢。